Schematic diagram of Lyp1 and Lyp2 deduced from the cDNA clones. Boxes indicate the open reading frame, with thin lines representing the 5′ and 3′ untranslated regions. The PTPase catalytic domain is colored in gray. The six overlapping cDNA clones obtained from a human thymus cDNA library (bold black lines) are shown under the schematic structures of the cDNAs.