protein secondary structure Article 16 human 13 Protein Structure, Secondary 12 controlled study 11 chemistry 10 metabolism 9 Humans 8 RNA 7 amino acid sequence 7 binding affinity 7 binding site 7 human cell 6 protein structure 6 Proteins 5 RNA sequence 5 genetics 5 protein 5 article 4 circular dichroism 4 computer model 4 conformational transition 4 gene expression 4 molecular dynamics 4 nonhuman 4 physiology 4 protein domain 4 unclassified drug 4 Amides 3 Amino Acid Sequence 3