Now hemoglobin is made up of hemes and globins.

血由血素与珠构成。

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

正常情况下，血由4条珠链组成，每条珠链都与一血素团结合。

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

这四种珠链以不同的方式结合，形成不同类型的血。

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

它含有四球，通常是2α和2β，每都含有血素分子。

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

它有4，典型的为两α和两β，每一都有对应的血素。

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

记住血中的珠是一种质，当质和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.

这些氧气与血结合，血由叫做血素的含铁的色素和叫做珠的质部分组成。

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地中海贫血是一种常染色体隐性遗病，由16号染色体上的α珠因缺陷引起。