Peptide-polysaccharides isolated from the culture medium of the fungus Paracoccidioides brasiliensis pathogenic to man

A peptido-polysaccharide isolated from the culture medium of Paracoccidioides brasiliensis has been studied. The crude product is a mixture of several polysaccharides releasing, by hydrolysis glucose, mannose and galactose. The purified fraction contains mannose (88%) and galactose (12%). This galactomannan has a molecular weight varying between 4.6.10(4) and 2.6.10(4). It is associated with a peptide containing four amino-acids.