"' Flavoprotein pyridine nucleotide cytochrome reductases "'catalyse the interchange of reducing equivalents between one-electron carriers and the two-electron-carrying nicotinamide dinucleotides.
32.
Heme-containing transmembrane ferric reductase domains ( FRD ) are found in both bacterial and eukaryotic proteins including ferric reductases ( FRE ), and NADPH oxidases ( NOX ).
33.
Phytoplankton can, however, obtain iron from siderophore complexes by the aid of membrane-bound reductases and certainly from iron ( II ) generated via photochemical decomposition of iron ( III ) siderophores.
34.
They are grouped as either assimilatory or dissimilatory sulfite reductases depending on their function, their cofactors-an iron sulfur cluster and a siroheme-which deliver electrons to the substrate via this coupling.
35.
This is evident from the occurrence of conserved ferredoxin-binding residues within the N . pharaonis NirA protein and ferredoxin dependence of nitrate and nitrite reductases in the halophile " Haloferax mediterranei ".
36.
The peripheral association of RDH13 with the membrane further distinguishes this protein from the microsomal retinaldehyde reductases, which are integral membrane proteins that appear to be anchored in the membrane via their N-terminal hydrophobic segments.
37.
"' The short-chain dehydrogenases / reductases family "'( SDR ) is a very large family of enzymes, most of which are known to be NAD-or NADP-dependent oxidoreductases.
38.
A human protein, GRHPR, has been identified that exhibits both DNA sequence of this protein is up to 30 % similar to the sequence of hydroxypyruvate and glyoxylate reductases found in a range of plant and microbial species.
39.
5?-Reductases act on 3-oxo ( 3-keto ), ? 4, 5 C19 / C21 steroids as its substrates . 3-keto refers to the double bond of the third carbon to oxygen.
40.
Hundreds of separate types of dehydrogenases remove electrons from their substrates and reduce NAD + into NADH . This reduced form of the coenzyme is then a substrate for any of the reductases in the cell that need to reduce their substrates.
