问题描述：
蛋白质结构问题
Large proteins,like DNA polymerase and hemoglobin,are often composed of several polypeptides that are linked together.The _____ level of protein structure describes how the polypeptides are joined to create a larger complex.
大的蛋白质分子们,比如说DNA聚合酶和血红蛋白酶经常组成多多肽链,这是由蛋白质的第几结构决定的
Large proteins,like DNA polymerase and hemoglobin,are often composed of several polypeptides that are linked together.The _____ level of protein structure describes how the polypeptides are joined to create a larger complex.
大的蛋白质分子们,比如说DNA聚合酶和血红蛋白酶经常组成多多肽链,这是由蛋白质的第几结构决定的
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