Fig. 3
From: Formation and discharge of nematocysts is controlled by a proton gradient across the cyst membrane
Formation and discharge of nematocysts is controlled by a proton gradient across the cyst membrane. Figures from Kühn (1916) and Holstein (1981), modified by J. Jacobi. pG polyglutamic acid, a major component of the cyst matrix (Weber 1989, 1990). Indicated onset of pG synthesis after Weber (1990) and Szczepanek et al. (2002). Discharge preceded by cyst swelling according to Holstein and Tardent (1984)