SSX4 GI:28559013 synovial sarcoma, X breakpoint 4 isoform b 1 mngddafarr prddaqisek lrkafddiak yfskkewekm kssekivyvy 50 51 mklnyevmtk lgfkvtlppf mrskraadfh gndfgndrnh rnqverpqmt 100 101 fgslqrifpk dpkggnmpgp tdcvressww fmkrsatlrk mtsnsprgyd 150 151 tcp