Download Gene Regulation in lac operon

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
Document related concepts
no text concepts found
Transcript 
Gene Regulation
Prokaryotes
(no nucleus)
Lac operon
• System of genes that can turn on and off
in E. coli (bacteria).
• These genes make enzymes that break
down the sugar in milk (lactose).
• Regulatory genes~ genes that affect other
genes (make them turn on or off)
• Structural genes~genes that code for a
protein
Structure of the Lac operon
Regulatory genes
S g #3
S g #2
Inhibitor/repressor (gene)
Promoter “region” (gene)
Operator “region” (gene)
Structural gene #1
Function of the Lac operon
Regulatory genes
S g #3
S g #2
Inhibitor/repressor (gene)
Promoter “region” (gene)
Operator “region” (gene)
Structural gene #1
Proteins that break down lactose
Repressor
(protein)
inhibitor
?
promoter
Lactose
operator
SG 1
SG2
RNA
polymerase
SG3
Related documents