Ctk1 + CTD mutants

Transcription termination in Saccharomyces cerevisiae can be performed by at least two distinct pathways and is directed by the phosphorylation status of the carboxy-terminal domain (CTD) of RNA polymerase II (Pol II)酿酒酵母（Saccharomyces cerevisiae）的转录终止可通过至少两种不同的途径实现，且该过程由RNA聚合酶II（Pol II）的羧基末端结构域（CTD）的磷酸化状态所调控。