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.
Schematic presentation of the conservation of intron numbers and positions of Sus genes from Nicotiana tabacum. Sequences are ordered according to the phylogenetic relationship of the corresponding coding regions, as shown on the left. Intron positions are indicated in relation to the position of exons. Dashes indicate the loss of introns in corresponding positions
