part of develops_from standing slug prestalk region of the tipped mound prestalk region of the standing slug DDANAT:0000019 Dictyostelium_discoideum_anatomy Elongated protrusion of the standing slug located on top of the cell mass that contains pstA cells flanked by pstO cells (expressing ecmA from the proximal and the distal part of its promoter, respectively). PMID:10642783 PMID:2513127 pst region of the standing slug prestalk region