Gene expression in 4 living lambs (2 hGH gene integration positive, 2 negative) wasdetected by ELISA, and no one exprcsscd humane Growth Hormone in plasma.

• 采用酶联免疫吸附法(ELISA)对仍存活的2头未整合、2头整合羊检测是否表达外源基因,全为阴性。