Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
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information only on official, secure websites.
Enhancer-traps with R8-specific patterns. In all panels the position of the MF is indicated by an arrowhead. (A) Expression in R8 only (type I pattern). (B) Expression in many cells within the MF resolves to R8 a few rows posterior to the MF (type II pattern).
