FXYD3 GI:209862819 FXYD domain containing ion transport regulator 3 isoform 2 precursor 1 mqkvtlgllv flagfpvlda ndledknspf yydwhslqvg glicagvlca 50 51 mgiiivmsew rssgeqagrg wgspplttql sptgakckck fgqksghhpg 100 101 etpplitpgs aqs