But the PPL researchers have succeeded in knocking out only one copy of the gene for the enzyme, called alpha 1，3 galactosyl transferase.
But the PPL researchers have succeeded in knocking out only one copy of the gene for the enzyme, called alpha 1，3 galactosyl transferase.
但是,PPL医疗公司的研究人员只是成功地去除了产生这种叫α1,3半乳糖转移酶的基因的一个副本。