Abstract
AMINO-ACID analysis has shown that the acid proteinase of Aspergillus saitoi (aspergillopeptidase A, EC, 3.4.4.17) contains one tryptophan and about twenty tyrosine residues in a molecule (average molecular weight, 34,550) (refs. 1–4). In this communication we describe the effect of chemical modification of aspergillopeptidase A and discuss the role of the single tryptophan residue in the molecule.
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ICHISHIMA, E., YOSHIDA, F. Tryptophan Residue in Aspergillopeptidase A. Nature 215, 412–413 (1967). https://doi.org/10.1038/215412a0
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DOI: https://doi.org/10.1038/215412a0
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