title: Amino-acid sequence of two trypsin isoinhibitors, ITD I and ITD III from squash seeds (Cucurbita maxima).
abstract: The amino-acid sequences of two trypsin isoinhibitors, ITD I and ITD III, from squash seeds (Cucurbita maxima) were determined. Both isoinhibitors contain 29 amino-acid residues, including 6 half cystine residues. They differ only by one amino acid. Lysine in position 9 of ITD III is substituted by glutamic acid in ITD I. Arginine in position 5 is present at the reactive site of both isoinhibitors. The previously published sequence of ITD III has been shown to be incorrect.
mesh_terms: D000595:Amino Acid Sequence; D010940:Plant Proteins / Q000302:isolation & purification*; D012639:Seeds / Q000032:analysis*; D014361:Trypsin Inhibitors / Q000302:isolation & purification*
chemical_list: D010940:Plant Proteins; D014361:Trypsin Inhibitors; C031809:trypsin inhibitor, Cucurbita sp.