The α-amanitin binding site is beneath a “bridge helix” extending across the cleft between the two largest pol II subunits, Rpb1 and Rpb2

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#Id: 8322

#Unit 2. Cellular Organization

Steady-state phase

G-actin monomers exchange with subunits at the filament ends, but there is no net change in the total length of filaments.

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#Id: 1445

#Unit 4. Cell Communication and Cell Signaling

Focal adhesion

Function- Shape, signaling, force transmission, cell movement

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#Id: 7266

#Unit 6. System Physiology – Plant

Chaperonins GroEL and GroES sequester and ensure the correct folding of the newly synthesized large subunit (L). 

The assembly chaperone (RbcX)2 binds the large subunit and provides positional information for proper association of large subunit dimers to form the L8–((RbcX)2)8 complex. 

The small subunit (S) associates with L8–((RbcX)2)8, triggering a conformational change in RbcL and eliciting 

the release of (RbcX)2 and formation of the catalytically mature Rubisco holoenzyme [L]8–[S]8.

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#Id: 6590

#Unit 7. System Physiology – Animal

Follicle-stimulating hormone, secreted by the anterior pituitary gland, stimulates the Sertoli cells; stimulates, the process of spermiogenesis

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#Id: 5874

#Unit 10. Ecological Principles

The greenhouse effect is caused by the insulating effect of atmospheric carbon dioxide.