Patent ID: 6951746

Claim:
A method of obtaining polyamines, comprising the steps of: providing a yeast RNA-containing composition; subjecting said yeast RNA-containing composition to a decomposition step, comprising nuclease digestion or alkali hydrolysis, for increasing the yield of polyamines recovered in a subsequent recovery step by approximately 2-3.2 times the yield of polyamines recovered in the subsequent recovery step without this decomposition step, under conditions where the yield with this decomposition step when continuing for approximately 15-19 hours is approximately 2-3.2 times the yield without this decomposition step, wherein said yeast RNA-containing composition is treated in solution with nuclease added in an effective concentration, at approximately 25-37° C., and at a pH of approximately 6-8, or said yeast RNA-containing composition is dissolved in a 0.3 N alkali solution at 37° C.; and recovering the approximately 2-3.2 times greater yield of polyamines from the decomposed yeast RNA-containing composition produced.