The light chain can have another 400 possible gene combinations.

轻链可以有另外 400 种可能的基因组合。

But these antibodies, made from two light chains and two heavy chains, are proteins.

但是这些由两条轻链和两条重链制成的抗体是蛋白质。

Combining heavy and light chains gives approximately 8 million different possible antibodies – each with a different binding site.

结合重链和轻链可产生大约 800 万种不同的可能抗体——每种都有不同的结合位点。