Chasin L A, Magasanik B
J Bacteriol. 1970 Jun;102(3):661-5. doi: 10.1128/jb.102.3.661-665.1970.
Sensitive assays of histidase activity were used to follow the production of this enzyme as directed by a gene newly introduced into cells of Bacillus subtilis by transformation. Histidase activity can be detected in histidase-negative recipient cells within 1 hr after the addition of deoxyribonucleic acid extracted from histidase-positive donors. Enzyme production continues for one to two additional hours and then ceases. Histidase production in the transformed cells is fully sensitive to catabolite repression. Catabolite repression is rapidly established after transformation of recipient cells that are resistant to this form of regulation.
采用对组氨酸酶活性敏感的检测方法,来追踪由通过转化新导入枯草芽孢杆菌细胞的一个基因所指导的该酶的产生情况。在添加从组氨酸酶阳性供体中提取的脱氧核糖核酸后1小时内,可在组氨酸酶阴性受体细胞中检测到组氨酸酶活性。酶的产生会持续额外的一到两个小时,然后停止。转化细胞中组氨酸酶的产生对分解代谢物阻遏完全敏感。在对这种调控形式有抗性的受体细胞转化后,分解代谢物阻遏会迅速建立。