Figure 2.

SRY structure and sequence in S. macroura. (a) Schematic diagram of SRY structure. Vertical arrow indicates the point of insertion of the 825 bp intron 3′ to the HMG box. Arrows indicate the direction and position of primers used in PCR. Splice consensus sequences are indicated both in the coding sequence flanking the insertion and at the ends of the intron. (b) Sequence of S. macroura SRY. The coding sequence is presented in uppercase letters and the intron sequence in lowercase letters. TaqI restriction sites are boxed and the splice consensus sequences are underlined.