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.
Gray rectangles indicate untranslated regions, and black rectangles indicate coding regions. Common nucleotide polymorphisms that influence extra-long chain content are indicated with black boxes. Other nucleotide polymorphisms within exons are indicated with dotted boxes. * indicates a stop codon.
