M. Rosafraile et al., IDENTIFICATION OF SERUM AND URINE PROTEIN RESPONSIBLE FOR ENHANCED PIGMENT PRODUCTION BY GROUP-B STREPTOCOCCI AS AMYLASES, Clinical and diagnostic laboratory immunology, 3(5), 1996, pp. 594-596
The serum and urine proteins responsible for enhanced pigment producti
on in Streptococcus agalactiae in culture media were purified by chrom
atography and were identified as amylases by comparison of their amino
acid composition with that calculated for proteins with known sequenc
es, Similar pigment-enhancing activity was displayed by other amylases
of nonanimal origin and by maltooligosaccharides.