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(Click for frequent words.) 71 flagellum 64 cilia 63 actin filaments 62 molecular motors 62 Caulobacter crescentus 61 flagellar 60 RNA strands 60 motile 60 motile cilia 60 pectoral fins 60 kinesins 60 FtsZ 59 organelles 59 helices 59 Dictyostelium 59 biological molecules 59 oviducts 59 paramecia 59 dynein 59 vortices 59 cilium 58 hindlimbs 58 nanomotors 58 bacterium Escherichia coli 58 actin filament 58 unicellular 58 Chlamydomonas 57 pelvic fin 57 myosins 57 fission yeast 57 stereocilia 57 whiplike 57 eukaryotic cell 57 ribozyme 57 flagellar motor 57 prokaryote 57 phytochrome 57 microtubules 56 eukaryotic cells 56 cell outer membrane 56 myosin 56 myosin VI 56 pelvic fins 56 nematode worms 56 bacterial flagellum 56 tRNAs 56 mRNA molecules 56 filaments 56 fluorescently tagged 56 hind limbs 56 forelimbs 56 bony structures 56 mouthparts 56 rhodopsin 56 disulfide bonds 56 nuclei 56 fluorescently labeled 56 focal adhesions 56 morphogens 56 lipid membrane 56 inchworm 56 trimers 56 protein filaments 56 resilin 56 Chlamydomonas reinhardtii 56 capsids 56 nanomachine 56 polypeptide chain 56 supramolecular 56 excitatory neurons 56 F actin 56 dynamin 56 filopodia 56 primary cilium 55 ciliary 55 fruitflies 55 macromolecule 55 lipid membranes 55 hind wings 55 collagen fibrils 55 sensory organ 55 colloidal particles 55 microbots 55 bacterial flagella 55 actin fibers 55 toroid 55 outer membranes 55 proteins 55 mandibles 55 Volvox 55 spicules 55 organelle 55 SNAREs 55 Shewanella 55 dynactin 55 cell nuclei 55 prokaryotic 55 neural crest cells 55 subcellular structures 55 ciliated 55 spicule 55 RNA molecule 55 ribonucleic acid molecules 55 riboswitch 54 Actin filaments 54 polypeptides 54 Thermus thermophilus 54 oscillatory 54 ciliates 54 flatworms 54 membrane lipids 54 magnetic monopoles 54 histone protein 54 paramecium 54 protein subunits 54 cobalt atom 54 unpaired electrons 54 amyloid fibrils 54 cadherins 54 operons 54 calmodulin 54 unicellular organisms 54 mitochondrion 54 oviduct 54 Hox gene 54 fimbriae 54 processive 54 Kv#.# channels 54 microtubule 54 tetramers 54 RNA fragments 54 microvilli 54 multicellular organisms 54 titin 54 amoeboid 54 magnetosomes 54 photosystem II 54 nanomachines 54 proteorhodopsin 54 tetramer 54 somites 54 Wnt proteins 54 cysteine residues 54 Rad# 54 kinesin 54 tubercles 54 keratins 54 polymerases 54 sarcomeres 54 artificial chromosomes 54 mitochondrial gene 54 soliton 54 integrins 54 rotifer 53 vinculin 53 fluorescent molecules 53 luminal surface 53 ultrasonic vibrations 53 prestin 53 outer membrane 53 intramolecular 53 helical structures 53 coiled coil 53 basal lamina 53 ribonucleic acid RNA 53 vesicle 53 Ichthyostega 53 synaptotagmin 53 distantly related species 53 sensory neurons 53 centrosomes 53 protuberances 53 amino acid residues 53 protein complexes 53 CPEB 53 filamentous 53 Caulobacter 53 Prevotella 53 axon 53 RNA enzymes 53 topoisomerases 53 chlorophylls 53 magnesium ions 53 planaria 53 heparan sulfate 53 Vibrio fischeri 53 chordates 53 circularly polarized light 53 plastids 53 neurone 53 chloroplasts 53 chromophores 53 amphioxus 53 fibril 53 normal prion proteins 53 dimer 53 zebrafish embryo 53 clathrin 53 centromeres 53 striated muscle 53 Wnts 53 hairlike 53 magnetic bead 53 morphogen 53 RecA 53 cadherin 53 radula 53 adatoms 53 micromachines 53 snail shell 53 unbranched 53 hind fins 53 helical 53 actin cytoskeleton 53 C. elegans 53 stilbene 53 manganese atoms 53 antibody antigen 52 nanorod 52 cellular organelles 52 helicases 52 photosystems 52 yeast prions 52 bacterial genomes 52 Sulfolobus 52 membrane protein 52 dimers 52 protocells 52 intermediate filaments 52 chromatin proteins 52 setae 52 zinc ions 52 planarians 52 hollow tubes 52 porphyrins 52 rotaxanes 52 worm C. elegans 52 Bose Einstein Condensate 52 solitons 52 tropomyosin 52 chaperonin 52 crosslinks 52 mammalian cells 52 centromere 52 actin 52 ribonucleic acids 52 primary cilia 52 contractile ring 52 single celled 52 Or#b 52 fungal genomes 52 prokaryotes 52 spinneret 52 donor acceptor 52 telomere DNA 52 Ubx 52 antiparallel 52 endonuclease 52 bilayer 52 NEDD8 52 microscopic single celled 52 phi# 52 capsid 52 sensory axons 52 condensin 52 molecules 52 papillae 52 centrioles 52 micromachine 52 ultracold molecules 52 spheroidal 52 Purkinje cells 52 quantum coherence 52 hydrogenase 52 membranous 52 Caenorhabditis elegans 52 appendages 52 crystal lattice 52 ultracold atoms 52 graphene sheet 52 archosaurs 52 laforin 52 disulfide bridges 52 SNARE proteins 52 Trichoplax 52 mutant proteins 52 airfoils 52 Xenopus 52 PIP2 52 neuronal pathways 52 molecule 52 transposable elements 52 DNA strands 52 nucleotide sequences 52 nucleolus 52 ankyrin 52 Skeletal muscles 52 gill slits 52 subcellular compartments 52 morphogenesis 52 chlorosomes 51 gluon 51 cone photoreceptors 51 locomotion 51 ssDNA 51 cytosol 51 intestinal epithelial cells 51 somatic motility 51 dinoflagellates 51 cellulose synthase complexes 51 choanoflagellates 51 cnidarians 51 disulfide bond 51 morphological evolution 51 magnetic tweezers 51 phonons 51 wormlike 51 epididymis 51 neuroligins 51 sarcomere 51 chlorophyll molecules 51 barbels 51 macromolecules 51 RNA molecules 51 radially 51 spindle fibers 51 arrestin 51 normal prion protein 51 nucleosome 51 chick embryos 51 spinnerets 51 actin binding 51 photosynthetic bacterium 51 protease enzyme 51 peroxisome 51 homolog 51 symbionts 51 scanning tunneling microscope 51 odorant receptors 51 quadrupedal 51 nanomagnets 51 green alga 51 cryptochrome 51 Xenopus laevis 51 motility 51 linearly polarized light 51 homodimers 51 tiny organelles 51 phagocytosis 51 Sonic hedgehog 51 dsRNA 51 electromagnets 51 DNA helix 51 oligomerization 51 nanochannels 51 forelimb 51 scanning tunneling microscope STM 51 cryptochromes 51 axons 51 nanocells 51 adhesion proteins 51 metazoans 51 retrotransposons 51 capillary tubes 51 female reproductive tract 51 eukaryote 51 interconversion 51 hydrophobicity 51 dye molecules 51 microrobots 51 elongated orbits 51 mammalian 51 bacterium E. coli 51 noncoding RNAs 51 cellulases 51 electrons 51 conformations 51 epithelial tissues 51 fascin 51 pili 51 histone H4 51 cell cytoplasm 51 germ cells 51 amyloid fibers 51 electron pairs 51 electrons behave 51 conformational changes 51 silicon atoms 51 Rydberg atom 51 quantum particles 51 CD1d 51 piercing sucking mouthparts 51 n cofilin 51 branes 51 unicellular organism 51 secretory cells 51 neurites 51 cell organelles 51 phosphorus atoms 51 glycans 51 water striders 51 hemoglobin molecules 51 nitrogen atoms 51 peristalsis 51 nanofibers 51 electrons orbiting 51 electrostatic attraction 51 micelles 51 non coding RNA 51 biosynthetic pathway 50 mantis shrimp 50 spheroids 50 optical vortices 50 glycan 50 mammalian brains 50 Histones 50 hairlike structures 50 interneurons 50 heterochromatic 50 collagen molecules 50 crocodilians 50 vesicle fusion 50 chromatids 50 fluorescent nanoparticles 50 hair follicle stem cells 50 caveolae 50 FGF signaling 50 isoprenoid 50 trophoblasts 50 fig. S1 50 prion proteins 50 helium atoms 50 BMP4 50 photosynthetic microbes 50 semicircular canals 50 planetary magnetospheres 50 subunits 50 glycoproteins 50 poly dA 50 alpha hemolysin 50 neurite 50 hexamers 50 posttranslational modifications 50 hairlike projections 50 single celled organisms 50 van der Waals forces 50 membrane fusion 50 hydrodynamic 50 fibrils 50 outer membrane proteins 50 gold nanorods 50 piconewtons 50 Hox genes 50 single celled algae 50 neural fibers 50 histones 50 PrPC 50 fruiting bodies 50 LIS1 50 protists 50 odorant molecule 50 Alu elements 50 elastic fibers 50 protein fragment 50 chiral molecules 50 multicellular 50 neural crest 50 plastid 50 cell membranes 50 virulence genes 50 quantum tunneling 50 cardiac myocytes 50 telomeric 50 opsins 50 SH2 B 50 controllably 50 lectins 50 muscle fibers 50 cellular membranes 50 single celled yeast 50 metazoan 50 biogenesis 50 spherical particles 50 symbiotic bacteria 50 sexually dimorphic 50 electronic excitations 50 chromatin structure 50 organism 50 upstroke 50 ATPase 50 magnetic particles 50 colocalization 50 phenylene 50 dermal papilla cells 50 Microtubules 50 rotifers 50 metalloproteins 50 genes encoding 50 microcephalin 50 nanometer sized 50 polaritons 50 circadian clocks 50 single walled nanotubes 50 axon guidance 50 protrusions 50 globular proteins 50 neurones 50 lipid bilayer 50 cobalt atoms 50 lipid droplets 50 biomolecule 50 secrete proteins 50 centromeric 50 microscopic hairs 50 micropipette 50 quantum particle 50 acetyl CoA 50 bilayers 50 paxillin 50 nanoscale structures 50 amoebae 50 dendritic spine 50 S. typhimurium 50 cofilin 50 mesenchymal cells 50 magnetic fields 50 SUMOylation 50 alpha helical 50 W bosons 50 denatured proteins 50 histone proteins 50 gamma oscillations 50 endospores 50 vibrissae 50 Cdc# 50 microRNA molecules 50 X. laevis 50 magnetotactic bacteria 50 quantum superposition 50 catalytically active 50 biomimetic 50 kinetochores 50 mitotic spindle 50 luminal cells 50 Golgi apparatus 50 retinal neurons 50 pilus 50 neuronal synapses 50 glucose oxidase 50 stinging tentacles 50 Dpp 50 motoneurons 50 ipRGCs 50 E cadherin 50 deuterostomes 49 evolutionarily conserved 49 monolayers 49 RNAs 49 microcantilever 49 bacterial membrane 49 actin remodeling 49 nanobelts 49 antigen receptors 49 froghopper 49 gp# [002] 49 lamellae 49 serrated teeth 49 morphologically 49 double helixes 49 XBP 1 49 AMPA receptors 49 FEN1 49 aerobic metabolism 49 auxin 49 vimentin 49 muscle contractions 49 intermolecular 49 commensal bacteria 49 Schwann cells 49 bdelloid rotifers 49 azobenzene 49 RNA sequences 49 Acoustic tweezers 49 centrosome 49 anal fins 49 green alga Chlamydomonas 49 nanobubbles 49 spectrin 49 endosymbiont 49 AFM cantilever 49 conformational 49 Drosophila embryos 49 Bessel beam 49 polymerize 49 chromatid 49 root nodules 49 molecular 49 lamina 49 optical lattices 49 dendrites 49 supramolecular structures 49 microscopy techniques 49 quasicrystal 49 microfluidic chip 49 sensory hairs 49 oligomer 49 adduct 49 microfluidic channels 49 catenin 49 punctate 49 TRP channels 49 roundworm C. elegans 49 homologs 49 coral polyps 49 placental mammals 49 lamellar 49 rostral 49 single celled organism 49 nanosheets 49 gastrulation 49 electron spins 49 siderophores 49 mesoderm 49 nucleon 49 spherical nanoparticles 49 fat globules 49 metalloproteases 49 plastron 49 microcompartments 49 MLL gene 49 lipid vesicles 49 lipid bilayers 49 hindgut 49 polypeptide 49 protist 49 spermatic cord 49 single celled bacteria 49 nanomotor 49 proteolysis 49 fibronectin 49 spatulae 49 hydrogens 49 symbioses 49 histone modifications 49 magnetic vortices 49 annelids 49 eggbeater 49 chromophore 49 methyl groups 49 CTCF 49 galactic disk 49 sea anemone 49 ankyrin repeats 49 multinucleated 49 acetyl groups 49 covalently 49 neurons astrocytes 49 galactose 49 endosymbiosis 49 gene encodes protein 49 dendrite 49 collagen fibers 49 virulence factors 49 ultracold gas 49 Cajal bodies 49 cortical neurons 49 transcriptional regulators 49 ontogeny 49 teleost fish 49 endosomes 49 tubule 49 uracil 49 antisense RNA 49 primordial germ cells 49 rubidium atom 49 chromosomal DNA 49 pelvic girdle 49 cell adhesion molecules 49 Math1 49 Corynebacterium 49 membranes 49 basilar membrane 49 wavefunction 49 myosin II 49 nanowires 49 photochemistry 49 piezoelectric crystals 49 diffraction pattern 49 acrosome 49 OCT4 49 viroid 49 valence electrons 49 polarized electrons 49 inner mitochondrial membrane 49 mutant mouse 49 cardiac fibroblasts 49 yolk sac 49 matrix metalloproteinases MMPs 49 spectroscopic techniques 49 photosynthetic machinery 49 micrometer sized particles 49 trichomes 49 homologous chromosomes 49 nematic 49 bacterial membranes 49 excitons 49 ERK2 49 hexamer 49 superhydrophobic surfaces 49 planarian 49 polymer nanofibers 49 regulate gene expression 49 transmembrane 49 superfluids 49 P. gingivalis 49 diffusible 49 mammalian sperm 49 chlorosome 49 ribonucleoprotein 49 plant hormone auxin 49 starch granules 49 metabolic enzymes 49 cuticular 49 glycosylated proteins 49 lysine residues 49 amorphous calcium carbonate 49 swim bladders 49 silicon nanowire 49 hindbrain 49 PKD1 49 slime molds 49 moss Physcomitrella patens 49 Fig. 2B 49 nanostructures 49 firefly gene 49 quasicrystals 49 epidermal cells 49 eukaryotic 48 melanocyte 48 fruit fly Drosophila 48 icosahedral 48 microstructures 48 transcriptional repressor 48 hyphae 48 budding yeast 48 structural rearrangements 48 zebrafish 48 nanocages 48 quantum mechanically 48 biosynthetic pathways 48 vertebrate embryos 48 alkane 48 nonmagnetic 48 worm Caenorhabditis elegans 48 carbenes 48 nanowire transistors 48 mammary cells 48 Dicer enzyme 48 granule cells 48 sargassum seaweed 48 lipases 48 mutated protein 48 deletion mutant 48 synthases 48 L1 retrotransposons 48 tetrahedrons 48 graphene nanoribbons 48 cohesin 48 CIB1 48 mica sheets 48 Hemagglutinin 48 regrow limbs 48 marine invertebrates 48 microscale 48 Gravitational waves 48 sialic acid 48 multivesicular bodies 48 nucleate 48 abnormal prions 48 Rubisco 48 RNAP enzyme 48 nanopillars 48 yeast cells 48 Drosophila melanogaster 48 hydrogels 48 MAPCs 48 nanorobots 48 Bacillus subtilis 48 yeast Saccharomyces cerevisiae 48 Photosystem II 48 electrospray mass spectrometry 48 constructal theory 48 proteolytic 48 sphingolipid 48 intercellular 48 zebrafish embryos 48 spaghetti noodle 48 capsid protein 48 micro RNAs 48 medaka 48 multiwalled carbon nanotubes 48 symbiont 48 filament 48 epicardium 48 ovipositor 48 microtissues 48 alpha helices 48 fibrin fibers 48 photon fluorescence 48 optic lobes 48 salps 48 sulfur atom 48 Arabidopsis plants 48 dipole moment 48 marine invertebrate 48 Prochlorococcus 48 vacuoles 48 chirality 48 tail flukes 48 midgut 48 boron nitride nanotubes 48 filamentous fungi 48 zebrafish Danio rerio 48 bucky balls 48 exocytosis 48 oppositely charged 48 nuchal 48 capsid proteins 48 ectoderm 48 molecular interactions 48 dimensional nanostructures 48 nerve cells 48 pheromone receptor 48 springiness 48 tubules 48 bacterium Bacillus subtilis 48 experimentally demonstrated 48 Mus musculus 48 FGFs 48 nucleons 48 crinoids 48 amoebas 48 nitrogenase 48 knifefish 48 Anomalocaris 48 cryo electron microscopy 48 cyto 48 enzymatic pathways 48 effector proteins 48 nanoneedle 48 streptavidin 48 membrane pores 48 coding genes 48 anterior posterior 48 magnesium ion 48 sister chromatids 48 chemical attractants 48 mesenchyme 48 maxillary palps 48 virion 48 PrP 48 quorum sensing 48 quasiparticles 48 RNA synthesis 48 proteinaceous 48 covalent bonds 48 neo cortex 48 larval zebrafish 48 tetrahedron 48 neurotrophin 48 amino acid sequences 48 antisense strand 48 tetrahedral 48 cell membrane 48 planktonic 48 operon 48 beryllium ion 48 neural tissue 48 chloroplast 48 diatomic 48 eyespots 48 cysteines 48 cofactors 48 molecular scissors 48 #BP# 48 isoforms 48 plexin D1 48 vertebrates 48 dielectrophoresis 48 SNARE complex 48 oxidative phosphorylation 48 superconducting qubit 48 nanodevices 48 Saccharomyces cerevisiae 48 otolith 48 cell adhesion 48 C. neoformans 48 nitrogen fixers 48 tiny capillaries 48 Alfvén waves 48 Optical tweezers 48 radial glia 48 protozoa 48 Fig. 3b 48 carbon nanotube bundles 48 cell motility 48 membrane proteins 48 endothermic 48 ostracods 48 superfamily 48 scanning electron microscopes 48 electron orbits 48 Mosquito larvae 48 porphyrin 48 polypyrrole 48 bistability 48 mycelia 48 nematode worm 48 bilaterally symmetrical 48 selenoproteins 48 Rab5 48 adipose cells 48 protozoans 48 exoskeletons 48 oligosaccharides 48 New Caledonian crows 48 nucleosomes 48 pharyngeal jaws 48 nanosensor 48 P. furiosus 48 SIRT1 gene 48 lipid molecules 48 polypeptide chains 48 heterochromatin 48 erythrocytes 48 copepod 48 mitotic spindles 48 neural cells 48 inhibitory neurons 48 hyoid 48 histidine 48 photoreceptors 48 caudal 48 nanogels 48 redox reactions 48 vesicles 48 distal tip 48 primitive vertebrates 48 Cyanothece 48 amino acids 48 synaptic inputs 48 clonally 47 hydrophobic surfaces 47 anatomical structures 47 surface plasmon 47 plasmodium 47 calcite crystals 47 TRIM5 47 nanohorns 47 subfamily 47 adenosine triphosphate 47 piRNAs 47 fluorescent probes 47 Manduca sexta 47 morphologies 47 TFIIH 47 unicellular algae 47 melittin 47 hollow cylindrical 47 dedifferentiation 47 osmotic pressure 47 synthetic gecko 47 biochemical processes 47 trabeculae 47 spider silk proteins 47 hematopoietic cells 47 flatworm 47 sinistral 47 hydrogen nuclei 47 photonic crystals 47 identical subunits 47 duplicated chromosomes 47 colugos 47 cytokinesis 47 vesicle membrane 47 fluorescent dye molecules 47 hydrophobic interactions 47 serrations 47 GAGs 47 lollipop shaped 47 Mycoplasma mycoides 47 enterocytes 47 mice lacking 47 exciton 47 HIP1 47 rubidium vapor 47 bosonic 47 microelectrode 47 Pollen grains