Amino acid sequence comparison of human SHIP with the murine p145^Ship protein. The SH2 domain is designated with a bold underline; the region homologous to the catalytic domain of inositol polyphosphate-5-phosphatase is a single underline; the open boxes show NPXY motifs; and the solid dots show amino acid insertions and/or deletions. The GenBank accession number is U84400.