Fig. 2. Normal lysosome function in the
ap3
mutant. (A) Gelatin-SDS-PAGE analysis to detect the activities of mature lysosomal cysteine peptidase CPB (arrowhead) and metallopeptidases (asterisk). (B) Metabolic labelling and immunoprecipitation analysis assessing the maturation of CPB in the wild-type and
ap3
cell lines. The mature CPB form is indicated by an arrowhead and the precursor forms by asterisks. Molecular masses are indicated on the right. (C) Labelling of the MVT-lysosome (arrowheads) in L. major
ap3
and wild-type promastigotes with GFP-tagged syntaxins LmjF19.0120 and LmjF29.0070 (green signal) and endocytic tracer FM4-64 (red signal). n, nucleus; k, kinetoplast; scale bars, 10 µm. Corresponding differential interference contrast (DIC) images are shown as well.