They found that HP1 proteins, which bind to methylated histones, also interact with the DNA methyltransferase, DNMT1, to stimulate its DNA methylation actiity.

• 他们还发现与甲基化组蛋白相结合的Hp1蛋白和DNA甲基转移酶（DNMT）即DNMT1之间也存在相互作用，它可激发DNA甲基化活性。