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Methionine amino peptidase will remove the N terminal formyl methionine if the N+1 amino acid is_________

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Methionine amino peptidase will remove the N terminal formyl methionine if the N+1 amino acid is_________

(a) Glycine

(b) Phenyl alanine

(c) Methionine

(d) Tyrosine

The question was asked in my homework.

My doubt is from Ribosome topic in division Gene Expression : Translation of Cytogenetics

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The correct answer is (a) Glycine

Best explanation: The N terminal amino acid can be removed only if the N+1 amino acid is small, i.e. Gly, Ala, Ser, Thr, Pro, Val or Cys. Here all other than Glycine are larger amino acid. So, only glycine in the N+1 position will suffice the result.

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