Which of the following vitamin is used in the electron transpo chain?
Thiamine
Riboflavin
Nicotinic acid
Vitamin B12
The biologically active forms, in which riboflavin serves as the prosthetic group (as coenzyme) of a number of enzymes are the phosphorylated derivatives. Two main derivatives are: * FMN (Flavin mononucleotide): In this the phosphoric acid is attached to ribityl alcoholic group in position 5. Flavin-Ribityl-PO4 * FAD (Flavin adenine nucleotide): It may be linked to an adenine nucleotide through a pyrophosphate linkage to form FAD. Flavin-ribityl-P-P-ribose-Adenine Thus, FMN and FAD are two coenzymes of this vitamin. FMN constitutes in * Warburg's yellow enzyme * Cytochrome-C-reductaseRef: MN Chatterjea Textbook of Medical Biochemistry, 8th edition, page no: 180
Respiratory chain