Tag Archives | Lac Operon

Structure of Lac Operon in E Coli | Genetics

In this article we will discuss about the structure of lac operon in E. coli. The lac operon comprises three structural genes (z, y & a) and produces a polycistronic mRNA (Lac mRNA). This messenger RNA codes for β-galactosidase, lac permease and transacetylase. The lac permease is a single unit protein that acts as a carrier for the entrance of [...]

By |2016-12-12T07:34:24+00:00December 12, 2016|DNA|Comments Off on Structure of Lac Operon in E Coli | Genetics

Properties of Lac Operon | Genetics

In this article we will discuss about the properties of lac operon. Also learn about the role of cyclic AMP in lac operon. i) Products of all genes are transcribed in a single mRNA, called polygenic or poly­cistronic, starting from single promoter site. ii) mRNA of lac operon mol wt. 1.7 x 106 daltons is far greater than the need [...]

By |2016-12-12T07:34:24+00:00December 12, 2016|DNA|Comments Off on Properties of Lac Operon | Genetics
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