TLS Online TPP Program

#Id: 6878

#Unit 3. Fundamental Processes

PRC1 complex binds the methylated nucleosomes through dimeric Pc subunits (CBXs in mammals), each containing a methyl lysine–binding domain (called a chromodomain) specific for methylated H3 lysine 27. 

Binding of the dimeric Pc to neighboring nucleosomes is proposed to condense the chromatin into a structure that inhibits transcription.

TLS Online TPP Program

#Id: 2336

#Unit 3. Fundamental Processes

The protein DskA  also plays an important role. It binds to RNA polymerase and reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations. 

TLS Online TPP Program

#Id: 1818

#Unit 10. Ecological Principles

r<0, the population decreases

r=0, the population remains constant

r>0, the population increases

TLS Online TPP Program

#Id: 434

#Unit 2. Cellular Organization

The nucleosome is a disc of 11 nm diameter and 6 nm height. 2πrh is surface are and πr2h is volume of nucleosome

 

TLS Online TPP Program

#Id: 9043

#Unit 4. Cell Communication and Cell Signaling

Switching mechanism of monomeric G proteins 

“On” state, switch I and switch II, are bound to the terminal γ phosphate of GTP with the backbone amide groups of conserved T & G.