SETT ATT FRAMSTELLA ETT HOGRENT ENSYM MED NEDBRYTANDE VERKAN PA KARIESFRAMKALLANDE MIKROORGANISMER

摘要

Method for purifying a micoorganism cells lytic enzyme by lowering the pH value of the aqueous solution containing the micoorganism cells lytic enzyme and proteases within a range of about 3.0 to 1.0 with an acid and, if necessary, by neutralizing the acidic mixture within a range of pH about 4.0 to 8.0 with an alkali and then filtering off the resulting precipitates and thereby removing off the proteases contaminated in the micoorganism cells lytic enzyme; the microorganism cells lytic enzyme being produced by cultivating a microorganism of the genus Streptomyces, e.g. S-1 strain (Streptomyces diastatochromogenes; ATCC No. 21481), H-191 strain (Streptomyces farinosus; ATCC No. 21482), H-402 strain (Streptomyces griseus var. H-402; ATCC No. 21483) and B-1829 strain (Streptomyces globisporus; ATCC No. 21553).