U07168 4977 1 1277 pRO1614 DNA U07168 4977 398 1244 rep U07168 4977 398 402 rep U07168 4977 1241 1506 lacZ alpha U07168 4977 1278 3205 pUC18 DNA U07168 4977 1425 1481 pSELECT-1 DNA U07168 4977 3303 4504 tet