Changes in the distribution of intramembranous particles and filipin-sterol complexes during epididymal maturation of golden hamster spermatozoa

F Suzuki - Journal of ultrastructure and molecular structure …, 1988 - Elsevier
Golden hamster spermatozoa in various segments of the excurrent duct system were studied
by freeze-fracture with and without filipin treatment. Two types of regular IMP
(intramembranous particle) patterns temporarily appear on the plasma membrane covering
the sperm head. One is a hexagonal arrangement seen in the acrosomal region, and the
other is a linear arrangement near the posterior ring. Both patterns are seen in the
spermatozoa from the corpus epididymidis. The FSC (filipin-sterol complex) density in the …