金属离子可以是辅助因素的催化中心，也可以帮助形成酶活性所必须的构象。
The metal ion may be the catalytic center of the cofactor, or it may serve to bind the enzyme and substrate together to hold the enzyme in a catalytically active conformation.
其它多聚糖则是由磷酸化己糖和核苷酸糖通过酶作用生成的其它糖聚合形成的。
Other polysaccharides are formed from other sugar, which rose by enzymic transformations of phosphorylated hexoes and sugar nucleotides.
他们的发现解释了染色体末端是怎样得到端粒的保护，而端粒是在端粒酶的作用下形成的。
These discoveries explained how the ends of the chromosomes are protected by the telomeres and that they are built by telomerase.
应用推荐