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.
Enhancer-blocking activity of scs and SF1b insulators paired with homologous and heterologous insulators. (A, B, and D–F) LacZ expression in transgenic embryos containing double insulators between the PE and E3 enhancers. Enhancement in the block of the PE enhancer is seen with PCC3 (A), PCB3 (B), PSF1bC3 (D), PSF1bSF1b3 (E), and PSF1bB3 (F). (C) LacZ expression in a PSF1b3 transgenic embryo.
