MOESM1 of Breast milk and in utero transmission of HIV-1 select for envelope variants with unique molecular signatures

Additional file 1: Figure S1. Domains of the HIV-1 envelope proteins. SP, signal peptide; C1–C5, conserved domains; V1–V5, variable domains; ECD, gp41 extracellular domain; TM, gp41 transmembrane domain; CD, gp41 cytoplasmic domain.