Related by context. Frequent words. (Click for all words.) 57 micelles 57 helices 57 cytosine 56 molecule 56 peptides 56 cysteine 55 polyethylene glycol 55 oligonucleotide 55 tyrosine 55 amino acid 55 microcapsules 55 molecules 55 peptide 55 water soluble 55 DNA strands 55 oligomers 54 chemically synthesized 54 glycoproteins 54 oligonucleotides 54 naturally occurring protein 54 biotin 54 proteins 54 fusion protein 54 monomers 54 phenylalanine 54 naturally occurring 54 nucleotide 53 biologically active 53 amino acids 53 soluble 53 microspheres 53 naturally occurring substance 53 protein 53 polysaccharide 53 methyl 53 methylated 53 functionalized 52 nanoparticle 52 glycerol 52 leucine 52 chemically 52 amino acid sequence 52 phospholipid 52 glutamine 52 galactose 52 synthetically 52 hydrolysis 52 ligands 51 lysozyme 51 small interfering RNA 51 adenine 51 aptamer 51 mutant protein 51 polysaccharides 51 nucleic acids 51 enzyme 51 plasmid DNA 51 active metabolite 51 bioactive 51 calcium phosphate 51 ceramide 51 cultured cells 51 plasma proteins 51 dimers 51 RNA molecules 51 chemically altered 51 PrP 51 fibrin 50 hydrogel 50 yeast cells 50 biodegradable polymers 50 acetylation 50 biological molecules 50 nanometer sized 50 bile acids 50 ascorbic acid 50 dimer 50 nucleotides 50 retinoic acid 50 sterols 50 aqueous solution 50 reversibly 50 sialic acid 50 biocompatible 50 liposomes 50 polymers 50 polymer 50 phospholipids 50 hydrophobic 50 isomers 50 genotoxic 49 bioavailable 49 chondroitin sulfate 49 carbon atom 49 amino 49 inactivates 49 polypeptide 49 organic acids 49 antibodies 49 metabolic pathway 49 butyrate