part of germline stem cell male germline stem cell male GSC FBbt:00004929 CL:0000016 Male germline cell and stem cell from which all other male germline cells develop. Male germline stem cells are part of the germinal proliferation center of the testis. They are arranged around a central hub made up of densely packed hub cells (apical cells), to which they are attached via adherens junctions. fly_anatomy.ontology germinal proliferation center male germline cell