Alignment of Lyp1 and PEP amino acid sequences. The PTPase domain is indicated by brackets. An arrow indicates the end of the amino acid sequence shared by Lyp1 and Lyp2 and the beginning of the unique C-terminal sequence of Lyp1. The NXXY motif is indicated by a line above the sequence. The four potential SH3 domain binding sites are also indicated (asterisks). A consensus sequence is shown below the alignment. The unique seven amino acids of Lyp2 are shown in the box below the alignment.