Nearly all of these proteins can be explained by a single gene family, so this means that the diversity of silk types we see today is encoded by one gene family, so presumably the original spider ancestor made one kind of silk, and over the last 380 million years, that one silk gene has duplicated and then diverged, specialized, the large variety of flavors of spider silks that we have today.
其中大多数蛋白质可以用 单基因家族解释 这就表示我们今日所见的蜘蛛丝分类 都是由单基因家族编码 所以，我们可以推测，最远古的蜘蛛始祖 可能只能吐出一种丝 后来经过3.8亿年的演化 其蛛丝基因被复制 接着出现分歧化和专门化 这样的过程不断重复 最终演化成我们今天的