Amino Acid Sequence of an Intrinsic Inhibitor of Mitochondrial ATPase from Yeast

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Abstract
The amino acid sequence of an intrinsic inhibitor of mitochondrial ATPase isolated from yeast was completed by using solid-phase sequencing and conventional procedures. The inhibitor was found to be composed of 63 amino acid residues, to lack tryptophan, cysteine, and tyrosine, and to have a molecular weight of about 7,383. The inhibitor was characterized as a basic protein with 16 basic and 13 acidic amino acid residues, and several clusters of basic residues were noted. Some comments are made on the hydrophobic amino acids and the presence of repeated sequences.