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.
Fig. 4. Five developmental stages of feathers and the regulators for natal down growth suppression in zebra finch. (A) Schematic diagram shows the five developmental stages of feathers: LoGZ, invagination, branching, feather β-keratin, and dermal papilla (Wu et al. 2018). (B) A summary of the mRNAs identified in Type I and Type II feather formations in zebra finch (Chen et al. 2016).
