Fig. 6. Amino acid sequence of zebrafish protein 4.1. The BLAST application was used to perform a pair-wise amino acid alignment of protein 4.1 in human and zebrafish, and to identify putative functional domains of zebrafish P4.1. Amino acids 1-330 (yellow) correspond to the N-terminal FERM domain; 400-1400 correspond to the 16 kDa domain; 1400-1513 (red) correspond to the spectrin binding domain; and the last 21 amino acids correspond to the 20 kDa domain of human protein 4.1. The four tandem repeats starting at amino acid 780 and ending at 1106 are indicated in green and blue.