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.
Primer extension analysis of 10.5 day yolk sac (YS) and 15.5 day fetal liver (FL) RNA from five additional LCR –1348 γ-β CACCC mutant transgenic mouse lines. The high levels of human β-globin RNA in the yolk sac confirm that the γ-globin gene CACCC box is essential for correct β-globin gene developmental specificity.
