title: Fine structure of spermatozoa of the Asiatic musk shrew, Suncus murinus.
abstract: The fine structure of spermatozoa of the Asian musk shrew, Suncus murinus, has been investigated using air-dried and critical-point-dried replicas in addition to freeze-fractured specimens. Asymmetry in the structure of the head, notable the acrosome, can be recognized in critical-point-dried replicas as a slight dorsoventral convexity not apparent in air-dried specimens. Freeze-etching reveals a dense accumulation of intramembranous particles just anterior to the posterior ring, but relatively few other characteristic membrane conformations associated with the head. Gelatin smears visualized with the light microscope show a vigorous lytic response, but preliminary efforts to remove the acrosome by physiological or enzymatic incubation have thus far not been successful.
mesh_terms: D000818:Animals; D005614:Freeze Fracturing; D008297:Male; D012788:Shrews / Q000033:anatomy & histology*; D013094:Spermatozoa / Q000648:ultrastructure*