Figure 3

Phylogenetic network of MHC class II B exon 2 sequences. Sequences from Galápagos hawks (Buga [in bold], Buteo galapagoensis) and Swainson's hawks (Busw, B. swainsoni) are included. Also shown are sequences from other members of the order Falconiformes, as well as species from Galliformes, Passeriformes, and Strigiformes (these three orders are labelled, and the rest of the species are from Falconiformes), which we downloaded from GenBank. The network was constructed using the Neighbor-Net method with Jukes-Cantor distances and is based on 255 bp of data. Most of the Galápagos and Swainson's hawk sequences fell into two clusters which are labelled Group 1 and 2. Species and accession numbers of sequences used: Acge, Accipiter gentilis [GenBank:EF370917]; Aemo, Aegypius monachus [GenBank:EF370890]; Anvi, Andropadus virens [GenBank:AY437907]; Asfl, Asio flammeus [GenBank:EF641250]; Aqch, Aquila chrysaetos [GenBank:EF370905]; Bubu, Buteo buteo [GenBank:EF370899-EF370900]; Ciga, Circaetus gallicus [GenBank:EF370913]; Haco, Harpyhaliaetus coronatus [GenBank:EF370901]; Fafe, Falco femoralis [GenBank:EF370951]; Fana, Falco naumanni [GenBank:EU107746]; Gaga, Gallus gallus [GenBank:AY744363]; Gyco, Gyps coprotheres [GenBank:EF370879]; Mimi, Milvus milvus [GenBank:EF370897]; Nepe, Neophron percnopterus [GenBank:EF370893]; Phco, Phasianus colchicus [GenBank:AJ224352]; Peau, Petroica australis australis [GenBank:AY428567]; Stne, Strix nebulosa [GenBank:EF641241]