Immunoglobulin Genomics in the Guinea Pig Figure 9. Phylogenetic analysis of mammalian VH genes. Guinea pig sequences are represented by red branches, other species sequences are represented by black branches. Three VH families of guinea pig were clustered respectively with other mammalian VH families, and the VH families of guinea pig belong to ClanII and ClanIII. The VH3 family could be divided into two subfamilies. doi:10.1371/journal.pone.0039298.g009 PLoS ONE | www.plosone.org 9 June 2012 | Volume 7 | Issue 6 | e39298