http://identifiers.org/mgd/MGI:96974 genetic mapping Kitlg Steel Mgf Steel factor Sl Sl|stem cell factor|grizzle-belly|blz|SLF|SCF|SF|Kitlg|Steel|Steel factor|Mgf|Gb O + kit ligand stem cell factor MGI:96974 Kitl SLF SF Gene Gb SCF blz grizzle-belly protein coding gene