Trypanosoma cruzi article priority journal nonhuman 322 Animals 202 Trypanosoma 191 controlled study 148 Molecular Sequence Data 134 trypanosoma cruzi 119 unclassified drug 110 Amino Acid Sequence 104 epimastigote 98 Animal 82 Support, Non-U.S. Gov't 82 Chagas disease 79 Protozoa 79 nucleotide sequence 78 Humans 73 Chagas Disease 72 Protozoan Proteins 69 enzyme activity 68 human 64 amino acid sequence 57 animal cell 48 Animalia 47 Cysteine Endopeptidases 45 Mammalia 44 trypomastigote 44 Base Sequence 43 Recombinant Proteins 38