The first responders are signaling proteins, called interferons.

首先起作用的就是信号蛋白，它也被称为干扰素。

They then secrete a signaling protein that converts surrounding cells into bone-forming cells.

它们然后分泌一种信号蛋白质，该蛋白质将周围的细胞变为可形成骨头的细胞。