characteristic features of the maturing and mature cell described include ( 1 ) differentiation and detachment of the operculum , ( 2 ) changes in cell shape corresponding to different developmental stages , ( 3 ) passive migration of the nucleus and acrosome from an anterior to a posterior position , and ( 4 ) eversion of that portion of the acrosomal canal containing the nucleus and acrosome .
C0007634
cell
C0007589
differentiation