Related by context. Frequent words. (Click for all words.) 63 thymine 63 cytosine 62 tyrosine 61 polypeptides 61 guanine 60 carbon atom 60 helices 59 cysteine 59 reductase 58 methyl 58 aldehyde 58 amino acid 58 nucleotide 58 molecule 58 amino acids 57 alkyl 57 vesicle 57 anion 57 PrP 57 bile acids 57 protein 57 dimers 57 phospholipid 57 chemically modified 57 bilayer 57 cytoplasmic 57 crystal lattice 57 cofactor 57 serine 56 signaling molecule 56 synthase 56 receptor gene 56 micelles 56 crosslinking 56 phospholipids 56 pyruvate 56 oxygen atom 56 glycoproteins 56 lectin 55 adenine 55 acetylation 55 heterochromatin 55 prion proteins 55 dimer 55 myoglobin 55 tRNA 55 polypeptide 55 galactose 55 amino 55 membrane protein 55 phenylalanine 55 ligands 55 cytosol 55 oligosaccharides 55 ceramide 55 cadherin 55 nitric oxide NO 55 retinoic acid 55 β 55 proteins 54 oxygen atoms 54 actin filaments 54 myosin 54 Cdc# 54 Ca2 + 54 NADH 54 protein fragment 54 unsaturated fatty acids 54 oligomers 54 histone 54 reactant 54 Neu5Gc 54 Saccharomyces cerevisiae 54 monomers 54 enzymatic activity 53 biotin 53 hydrolysis 53 hydride 53 molecules 53 RNA molecule 53 rhodopsin 53 glutamic acid 53 hydroxyl 53 glutamine 53 transduction 53 leucine 53 E cadherin 53 glycolysis 53 ligand 53 aldehydes 53 Fig. 1A 52 homologous recombination 52 endosomes 52 lysosome 52 MAPK 52 hydrogen ions 52 chloroplast 52 homologous 52 ribozyme 52 proline 52 metal ions