Now hemoglobin is made up of hemes and globins.

蛋白素与珠蛋白构成。

Normally, hemoglobin is made up of four globin chains, each bound to a heme group.

正常情况下，蛋白4条珠蛋白链组成，每条珠蛋白链都与一个素团结合。

These four globin chains combine in different ways to give rise to different kinds of hemoglobin.

这四种珠蛋白链以不同的方式结合，形成不同类型的蛋白。

There are four globin subunits, typically two alpha and two beta, and each one has its own heme group.

它含有四个球蛋白，通常是2个α2个β，每个都含有素分子。

There are 4 globin subunits, typically two alpha and two beta, and each one has its own heme group.

它有4个，典型的为两个α两个β，每一个都有对应的素。

Remember that the globin in your hemoglobin is a protein — and when proteins bind to stuff, they tend to change shape.

记住蛋白中的珠蛋白是一种蛋白质，当蛋白质其他物质结合时它们就会改变形状。

This oxygen is bound to hemoglobin, which consists of an iron-containing pigment called heme and a protein part called globin.

这些氧气与蛋白结合，蛋白叫做素的含铁的色素叫做珠蛋白的蛋白质部分组成。

All right, as a quick recap: alpha thalassemia is an autosomal recessive disorder caused by deletion of alpha globin genes on chromosome 16.

得！快速回顾一下：α地中海贫是一种常染色体隐性遗病，16号染色体上的α珠蛋白因缺陷引起。