Modifies a noun

• nucleotide: Thus, axon protection is likely to be mediated by altered ubiquitination or pyridine nucleotide metabolism.

• amplificant: The attachment locant " 4 " in each pyridine amplificant is invariant.

• ring: First, look at the hydroxyl group on the pyridine ring.

• transhydrogenase: Pyridine nucleotide transhydrogenase catalyzes the reduction of NADP + to NADPH with the concomitant oxidation of NADH to NAD + .

• nucleus: Ladenburg ( 1883, 1887 ) demonstrated that the molecule contained a reduced pyridine nucleus.

• derivative: Contact dermatitis from castor oil and vitamin B was attributed to pyridine derivatives ( Kadlec & Hanslian 1965 ).