1995 Volume 59 Issue 8 Pages 1586-1587
Two chitinases (Chi-A and Chi-B) purified from Streptomyces sp. J-13-3 had the same molecular weights (31, 000) and enzymatic properties (optimum pH and temperature of pH 6.0 and 45°C) but had significantly different isoelectric points (3.9 for Chi-A, 3.5 for Chi-B). Chi-A and -B had identical N-terminal amino acid sequences (ADXAAAWNASSVYTGGGSASYNGHN), similar amino acid compositions, and immunological cross-reactivities. A concomitant decrease of Chi-A and increase of Chi-B was observed in their productions during cultivation.
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