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.
ELISA of Ig levels in serum of unimmunized Id3+/+ (n = 16) and Id3−/− (n = 16) mice. Results are presented as mean ± standard error for 16 mice for each genotype. Asterisks denote values that are significantly different from the wild-type controls (t test; P < 0.005).
