Figure 4. Copy number variation analysis of Hsp70 family genes from various vertebrates.

Hspa5 and Hspa9 had one copy in these species, while copy numbers of the other genes ranged from 0 to 5. Hspa4 and Hspa8 had duplicated in fishes, while Hspa2 and Hspa6 may be lost in fishes (previously named Hspa2 in medaka would be Hspa1). Squares with different colors represent different genes and copies, while white squares denote the genes, which have not been detected in these species.