Medical MCQ-Sulphur of cysteine are not used/utilised in the body for the following process/product:

Sulphur of cysteine are not used/utilised in the body for the following process/product:

Help in the conversion of cyanide to thiocyanate

Thiosulphate formation

Introduction of sulphur in methionine

Disulphide bond formation between two adjacent peptide

Question Category:

Biochemistry

Correct Answer:

Introduction of sulphur in methionine

Description:

Ans. C. Introduction of sulphur in methionine.Methionine is an essential amino acid, so it cannot be synthesized from Cysteine.But Sulphur of cysteine is donated by sulphur of methionine.This is called transulfuration reaction.PLP is the coenzyme of transulfuration.The reaction is catalysed by Cystathionine beta Synthase and Cystathionase enzyme.

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