Manifests poly C-specific RNase activity toward yeast tRNA, elicits a dose-dependent inhibition of cell-free translation, inhibits formation of superoxide ions in vitro and inhibits the hemagglutinating activities of soybean lectin and Ricinus communis agglutinin 120. Inhibits HIV-1 reverse transcriptase. Milk. Glycosylated. Belongs to the pancreatic ribonuclease family.