Abstract
In a medium containing glycerol as u carbon source, Streptomyces olivaceus 605 accumulated under mild aeration a large amount of porphyrin in the culture filtrate. Identity of methyl ester of the porphrin with coproporphyrin III methyl ester was confirmed by UV-, IR- and NMR- spectroscopy. Under the cultural conditions favarable for production of corrinoid, the accumulation of coproporphyrin III markedly decreased.