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.
Comparison of the genomic structure of human retinoblastoma genes and of the functional domains in different Rb-related proteins. Boxes indicate exons of the human RB gene; hatched boxes indicate exons encoding domains A and B. Adapted from [7].
