Some of the cytochrome b6 f complexes are found in the stroma region of the membrane, where photosystem I is located. Under certain conditions cyclic electron flow from the reducing side of photosystem I, through the b6 f complex and back to P700, is known to occur.

TLS Online TPP Program

#Id: 9366

#Unit 4. Cell Communication and Cell Signaling

Within the nucleus, R-Smads are modified by:

Phosphorylation of linker domains

Acetylation of MH1 domains

Dephosphorylation of the C-terminal serines by nuclear

phosphatases

TLS Online TPP Program

#Id: 5989

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5442

#Unit 7. System Physiology – Animal

voltage-gated K + channels bring the action potential to an end and cause closure of their gates through a negative feedback process

TLS Online TPP Program

#Id: 809

#Unit 3. Fundamental Processes

In the bacterial genome, the minimum length of promoter that could provide an adequate signal is 12 bp.  The minimum length required for unique recognition increases with the size of genome, a problem in eukaryotic genomes.

TLS Online TPP Program

#Id: 3233

#Unit 3. Fundamental Processes

Global genome repair and transcription-coupled repair differ in their mechanisms of damage recognition (XPC vs. RNA polymerase II).