. . "Third, similar to the spacing between the Y-X2-L/I motifs in the pufferfish ITAMs, the spacing of the catfish Y-X2-L/I motifs, D/E-X8-D/E???X2-Y-X2-L/I-X8-Y-X2-L/I, is one amino acid longer than that of mammals, i.e. consists of eight amino acids instead of seven." . .