Ultrastructural study of gerl in beige mouse alveolar macrophages.

Alveolar macrophages of the beige mouse mutant have a system of smooth- surfaced elements with the hallmarks of GERL. GERL also appears to produce residual bodies, and both organelles show cytochemically demonstrable acid phosphatase activity. When cells are exposed to colloidal silver, the tracer is endocytosed via pinocytic vacuoles to GERL.