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

它含有四球蛋白基，通常是2α基2β基，每基都含有血红素分子。

DNA is a polymer because it is a large molecule composed of repeated subunits, the nucleotides.

DNA 是一种聚物，因为它是由复的基，即核苷酸组成的大分子。

They're made up of multiple subunits of an organic molecule called isoprene, which has five carbon atoms.

它们是由多有机分子基组成的，含有五碳原子的异戊二烯。

Recombinant protein subunit vaccine does not need a high-grade biosafety laboratory for manufacture, and can quickly achieve large-scale production.

组单位蛋白不需要高等级的生物安全实验室进行生产，可以快速实现规模化生产。

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

它有4基，典型的为两α基两β基，每一都有对应的血红素。

Both subunit and conjugate vaccines contain only pieces of the pathogens they protect against.

单位结都只包含它们可以抵御的病原体片段。

The acellular pertussis vaccine and influenza vaccine (in shot form) are examples of subunit vaccines.

无细胞百日咳流感（注射形式）是单位的例子。

Another type of subunit vaccine can be created via genetic engineering.

另一种单位可以通过基因工程制造。

Subunit vaccines use only part of a target pathogen to provoke a response from the immune system.

单位仅使用目标病原体的一部分来激发免系统的反应。

These subunits can be arranged in a line, or form rings, or both, leading to a diverse collection of over 30,000 known compounds.

这些基被组成线性或者是环形，或者是两者皆有，形成了如今超过三万种已知的化物。

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

每血红蛋白分子由四基组成，每基都包含一可以结一氧分子的血红素基团。

This heme is a large molecule that's made up of four pyrrole subunits that forms a ring, and this structure is called a porphyrin.

血红素是大分子，由四吡咯基形成环形，这结构叫作卟啉。

The word 'plastic' can describe any material made of polymers, which are just the large molecules consisting of the same repeating subunit.

“塑料”一词可以描述任何由聚物制成的材料，聚物只是由相同的复基组成的大分子。

This heme is a large molecule that's made up of four pyrrole subunits that form a ring, and this structure is called a porphyrin.

血红素是一由4吡咯基形成的环状大分子，这种结构称之为卟啉。

As a quick recap: sickle cell disease is an autosomal recessive genetic disease where the beta-globin subunit of hemoglobin is misshapen, which causes red blood cells to sickle when deoxygenated.

好！简要回顾一下：镰状细胞病，是常染色体隐性遗传病，其中血红蛋白的β-珠蛋白发生突变，脱氧情况下会导致红细胞镰变。

They’re made up of multiple subunits of an organic molecule called isoprene, which has five carbon atoms. These subunits can be arranged in a line, or form rings, or both, leading to a diverse collection of over 30,000 known compounds.

它们由称为异戊二烯的有机分子的多基组成， 异戊二烯具有五碳原子。这些基可以排列成一条线， 或形成环，或两者兼而有之， 从而形成超过 30, 000 种已知化物的多样化集。