please explain what is Z gene for me?!!?

Question

pliz explain it for me more detail, about its definition, its function, can be found at where, etc...

Answer 1

If you mean the Lac Z gene, this is a gene part of the Lac Operon and it has to do with the ability of E. colito utilize the sugar lactose. Lactoseis a 12 Carbon sugar made of 2 simpler 6 Carbon sugars, glucose and galactose. The enzyme for breaking down lactose in E. coli is called β-galactosidase.

The lac-operon is actually a series of adjacent genes and regulatory elements in one small part of the E. colicircular chromosome. Part of this operon are the genes I, A, Z and Y.

The I gene is called a regulator gene; it is transcribed to make a mRNA which is translated to a repressor protein. There is a termination signal at the end of the Igene.

O stands for Operator; it is a short sequence of bases that acts like a switch that can be recognized by repressor protein.

Z, Y and Aare all "structural genes (genes that code for polypeptides). Z codes for β-galactosidase; Y codes for lactose permease, a protein that functions to actively bring lactose from outside to cell to the inside, even against a concentration gradient. A codes for transacetylase, an enzyme that is also needed to breakdown many sugars related to lactose.

One long mRNA is made for the Z, Y and A genes; this is the basis for the system being called an operon. All 3 genes that code for enzymes needed to use β-galactoside molecules as a source of carbon and energy are adjacent and are coordinately turned on or off by regulating transcription. Operons are only found in prokaryotes; in eukaryotes, each structural gene has its own promoter and regulatory elements.

Answer 2

I did not know what is it exactly
I found this in Wikipedia. It seems to be a gene influencing the colr of horse's skin