Figure 2From: Structure and evolution of the mouse pregnancy-specific glycoprotein (Psg) gene locusEvolutionary relationships between mouse PSG IgV-like domains. An unrooted evolutionary tree based on ClustalX amino acid sequence alignments showing the relationships between all mouse PSG N-domains. The three main groups N1, N2 and N3 have been ringed for clarity. The scale bar represents 0.1 amino acid substitutions per site.Back to article page