Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Ultrastructure of spermatozoa from wild-type and nectin-2−/− mice. Electron micrographs of spermatozoa from the epididymides and vasa deferentia of nectin-2+/+ (A) and nectin-2−/− (B to D) mice. (A) Head and middle piece. Arrowheads indicate the mitochondrial helical sheath. (B) Head containing mitochondria and deformed nucleus. (C) Deformed mitochondrial helical sheath. (D) Head containing mitochondria and abnormal outer dense fibers. Bars = 500 nm.
