Pertussis toxin, produced by Bordetella pertussis, catalyzes ADP-ribosylation of the  subunit of Gαi, preventing GDP-GTP exchange and blocking inhibition of adenylyl cyclase.

TLS Online TPP Program

#Id: 6076

#Unit 10. Ecological Principles

Extinctions are most caused by introduced species and 

TLS Online TPP Program

#Id: 5685

#Unit 7. System Physiology – Animal

The posterior lobe hormones are nanopeptides with a disulfide ring at one end

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#Id: 428

#Unit 2. Cellular Organization

Individual nucleosomes can be obtained by treating chromatin with the endonuclease micrococcal nuclease (MNase), which cuts the DNA between nucleosomes, a region known as linker DNA.

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#Id: 5568

#Unit 7. System Physiology – Animal

Assume in addition that the pumps in the thick ascending limb can pump 100 mOsm/kg of Na+ & Cl– from the tubular fluid to the interstitium, increasing interstitial osmolality to 400 mOsm/kg of H2O 

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#Id: 378

#Unit 2. Cellular Organization

Topological states of covalently closed, circular (ccc) DNA.