The short (∼20 amino acid) C-terminal tails of both α- and β-tubulin that protrude from the microtubule are enriched in glutamic and aspartic acids, the surface of the microtubule possesses a net negative charge.

TLS Online TPP Program

#Id: 10126

#Unit 6. System Physiology – Plant

Auxin always exits cells as IAA- anions via auxin anion efflux carriers that are concentrated at the basal ends of each cell in the longitudinal pathway.

TLS Online TPP Program

#Id: 8111

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 5205

#Unit 7. System Physiology – Animal

Anticlotting mechanisms  The tendency of blood to clot is balanced in vivo by reactions that prevent clotting inside the blood vessels, break down any clots that 

do form, or both.

TLS Online TPP Program

#Id: 9077

#Unit 4. Cell Communication and Cell Signaling

β-Arrestin (Arr) binds to these phosphorylated receptors. Clathrin and AP2, two other proteins bound by β-arrestin, promote endocytosis of the receptor.

TLS Online TPP Program

#Id: 1176

#Unit 7. System Physiology – Animal

Inputs from eye to CNS: 

• Input from the rods 

• Input from the cones