Fig. 4. Intracellular level of precursor forms of the alkaline extracellular
protease in Y. lipolytica wild-type and
sbh1 strains.
Total intracellular protein was extracted from wild-type cells (lane 1),
wild-type cells transformed with the mutated copy of the XPR2 gene
(lanes 2 and 3),
sbh1 cells (lane 4) and
sbh1
cells expressing the mutant protease (lanes 5 and 6). Proteins were analyzed
by SDS-PAGE and blotted with anti-AEP antibodies.