Fig. 1
From: Role of cytoskeleton-related proteins in the acrosome reaction of Eriocheir sinensis spermatozoa
Acrosome-reacting spermatozoa and fresh spermatozoa in Eriocheir sinensis. A fresh spermatozoa; B acrosome-reacting spermatozoa; C Diagram for the process of acrosome reaction in spermatozoa. The process of acrosome reaction can be divided into four stages: (1) the contraction of radial arm and the breaking to form an aperture on apical cap; (2) the reversion of acrosome vesicle; (3) the extension of acrosome tubule; (4) the shrinking and disappearance of lamellar structures. RA: Radial arm; AC: Apical cap; AT: Acrosome tubule; LS: Lamellar structures; ML: Middle layer; FL: Fribrous layer; N: Nucleus