SOS response in E. coli: 

The LexA protein is the repressor in this system, which has an operator site near each gene. Because the RecA gene is not entirely repressed by the LexA repressor, the normal cell contains about 1,000 RecA monomers. 

TLS Online TPP Program

#Id: 5104

#Unit 6. System Physiology – Plant

PIFs promote etiolated development in the dark (skotomorphogenesis) primarily by serving as transcriptional activators of dark induced genes.

TLS Online TPP Program

#Id: 7403

#Unit 5. Developmental Biology

Cytoplasmic inhibitor protein of dorsal is Cactus.

TLS Online TPP Program

#Id: 10331

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 6495

#Unit 3. Fundamental Processes

TFIIB, TFIIE, and TFIIH are required to melt DNA to allow polymerase movement. The last factors to join the initiation complex are TFIIE and TFIIH. 

TLS Online TPP Program

#Id: 8647

#Unit 2. Cellular Organization