Hemoglobin is actually made up of four peptide chains, each bound to a heme group.

血红蛋白实际上是由四条肽链构成，其中每条肽链均与亚铁血红素结合。

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

正常情况下，血红蛋白由4条珠蛋白链组成，每条珠蛋白链都与一个血红素基团结合。

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

它含有四个球蛋白亚基，通常是2个α亚基和2个β亚基，每个亚基都含有血红素分子。

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

它有4个亚基，典型的为两个α亚基和两个β亚基，每一个都有对应的血红素。

Recycling of that heme group yields unconjugated bilirubin, which at high concentration can cause scleral icterus, jaundice, and bilirubin gall stones.

亚铁血红素的循环利用会产生非结合胆红素，其浓度过高会导致巩膜黄染、黄疸与胆红素胆结石。

That iron-containing myoglobin starts out red, but as it heats up the iron in its heme group oxidizes and it turns this brown color.

含铁的肌红蛋白开始是红色的，但是当它加热血红素组中的铁时，它会氧化并变成棕色。

Each hemoglobin molecule contains four heme groups with iron cores to which oxygen binds.

每个血红蛋白分子包含四个血红素基，铁核与氧结合。

Each hemoglobin molecule is made of four subunits, each containing a heme group that can bind one molecule of oxygen.

每个血红蛋白分子由四个亚基组成，每个亚基都包含一个可以结合一个氧分子的血红素基团。