Immunogen Sequence: FAHEAPAFLP WHRLFLLRWE QEIQKLTGDE NFTIPYWDWR DAEKCDICTD EYMGGQHPTN PNLLSPASFF SSWQIVCSRL EEYNSHQSLC NGTPEGPLRR N. The enzyme encoded by this gene catalyzes the first 2 steps, and at least 1 subsequent step, in the conversion of tyrosin