Formation and reversion of Schizosaccharomyces pombe cells with apical protoplast protuberances.

Lytic enzymes from the hepatopancreas of Helix pomatia do not induce a uniform digestion of the cell wall of Schizosaccharomyces pombe over the entire cell surface. Perforations are formed in growth zones through which a protoplast can locally protrude. Conditions were found under which the frequency of formation of apical protoplast protuberances is higher than 90% cells with such protuberances can reverse to normally multiplying cells.