He suspected a protein called NGFI-A, which is produced in response to stimulations such as licking and grooming.
他怀疑是一种叫NGFI - A的蛋白。在受到舔舐和喂食的刺激时会产生这种蛋白。
2
This suspicion was confirmed when he found it is also the case that the more maternal care a pup receives, the more NGFI-A it has bound to its glucocorticoid-receptor genes.