(A) Comparison of the amino acid sequences of mouse Brorin and zebrafish Brorin. The numbers refer to the amino acid positions of mouse and zebrafish Brorin. Asterisks and arrows indicate identical amino acid residues in the sequences and positions of introns, respectively. Underlining at the amino terminus and core sequence indicates the putative secreted signal sequence and cysteine-rich domains, respectively. (B) The syntenic relationship between mouse chromosome 2A2 and zebrafish chromosome 13. Mb, megabase.