Abstract.
A strain of Rhizopus stolonifer produced high levels of extracellular ribonuclease (RNase) when grown on YPG (yeast extract, peptone, glucose) medium. Influence of various medium components on the production of extracellular RNase activity showed that divalent metal ions had a marked effect on growth and enzyme production. Maximum enzyme activity (3000 U/ml) was obtained in 5 days when the culture was grown in YPG medium containing Mg2+ (12 mM), Mn2+, and Fe2+ (2 ppm each). Inorganic phosphate, however, repressed enzyme production. Antibodies raised against the purified extracellular RNase were then used to establish the relationship between intra- and extracellular enzymes.
Similar content being viewed by others
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chacko, R., Deshpande, M. & Shankar, V. Extracellular Ribonuclease Production by Rhizopus stolonifer: Influence of Metal Ions. Curr Microbiol 32, 246–251 (1996). https://doi.org/10.1007/s002849900044
Issue Date:
DOI: https://doi.org/10.1007/s002849900044