genome kPetMar1.pri trackDb kPetMar1.pri/trackDb.txt twoBitPath kPetMar1.pri/kPetMar1.pri.2bit groups kPetMar1.pri/groups.txt description kPetMar1.pri organism kPetMar1.pri scientificName kPetMar1.pri defaultPos S1:0-100000