An official website of the United States government
Here's how you know
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.
Sagittal micrographs of distal femoral metaphyses of Y2−/− Y4−/− double knockout mice (D) compared to those of control (A), Y2−/− (B), or Y4−/− (C) male mice. The micrographs show darkly stained bone tissue and are representative of the respective groups. Bar, 1 mm.