Methionine Metabolism || Homocystinuria || NEET PG || Biochemistry

This video is on metabolism of methionine which is sulphur containing amino acid and homocystinuria. Three sulphur containing amino acids are: Cystine Cysteine Methionine Methionine is an essential whereas cysteine and cystine are nonessential amino acids. Cysteine and cystine are synthesized from two amino acids, methionine, and serine Cystine and cysteine are readily inter-convertible in the body Metabolism Of Methionine Methionine is metabolized by: 1. Transfer of methyl group of methionine by Transmethylation reactions 2. Conversion of demethylated portion of the methionine to cysteine and cystine.