Hemlock (Cicuta sp.) produces cicutoxin, a polyacetylene that prolongs the repolarization of neuronal action potentials.

TLS Online TPP Program

#Id: 8868

#Unit 2. Cellular Organization

TLS Online TPP Program

#Id: 8464

#Unit 1. Molecules and their Interaction Relevant to Biology

The overall effect is a significant net dipole for the a helix that gives a partial positive charge at the amino end and a partial negative charge at the carboxy end of the a helix. 

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#Id: 7102

#Unit 6. System Physiology – Plant

Aminoethoxy-vinylglycine (AVG) and aminooxyacetic acid (AOA) block the conversion of AdoMet to ACC.

AVG and AOA are known to inhibit enzymes that use the cofactor pyridoxal phosphate. The cobalt ion (Co2+) is also an inhibitor of the ethylene biosynthetic pathway, blocking the conversion of ACC to ethylene by ACC oxidase, the last step in ethylene biosynthesis

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#Id: 5546

#Unit 7. System Physiology – Animal

Paracellular reabsorption of cations (K+) causes slight positive charge (+8)of the tubular lumen relative to the interstitial fluid

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#Id: 1176

#Unit 7. System Physiology – Animal

Inputs from eye to CNS: 

• Input from the rods 

• Input from the cones