Peptide Fragments article 56 priority journal 54 nonhuman 48 controlled study 46 Animals 36 peptide fragment 34 metabolism 28 Amino Acid Sequence 24 Humans 24 Mice 24 Molecular Sequence Data 22 unclassified drug 20 amino acid sequence 18 genetics 18 human 18 animal experiment 16 animal tissue 16 chemistry 16 mouse 16 Article 14 Female 14 Support, Non-U.S. Gov't 14 Trypanosoma cruzi 14 animal 14 animal cell 14 female 14 Animal 12 Caseins 12 Electrophoresis, Polyacrylamide Gel 12