55.辨識六個核苷酸序列(5'-GAATTC-3')的Eco RI限制酶會將基因..-阿摩線上測驗
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4F 蓉 國二上 (2024/03/07)
How many times can a restriction enzyme cut a piece of DNA? The probability that a given enzyme will cut, or “digest”, a piece of DNA is directly proportional to the length of its recognition site. Statistically, an enzyme will average one cut for every 4n base pairs, where n is the length of the recognition site. Therefore, the longer a DNA molecule is, the greater the probability is that it contains one or more restriction sites. For instance, an enzyme that recognizes six base pairs (e.g., EcoRI) will cut once every 4096 (or 46) base pairs. If EcoRI is used to digest both human ... 查看完整內容 |