A disulphide bond can be formed between A: Two methionine residues B: Two cysteine residues C: A methionine and a cysteine residue D: All of these

The most important role of S-adenosyl methionine (SAM) is.

Whichone<br/>is<br/>the essential amino acid?() A: glycine B: methionine C: tyrosine D: Glutamine

Which of the following amino acids doesn’t belong to essential amino acids?? Methionine|Isoleucine|Valine|Cysteine

以下哪些为必需氨基酸（） A: methionine B: valine C: isoleucine D: cystein E: tyrosine

Which one of the<br/>following amino acids can be phosphorylated? () A: Tyrosine B: Alanine C: Aspartate D: Methionine E: Glutamine

Which one of the following amino acids in the protein does NOT have<br/>its genetic codon? ( ) A: Methionine B: Hydroxyproline C: Tryptophan D: Glutamine

甲硫氨酸(Methionine)含有一个活泼甲基，因此，是机体甲基化反应中甲基的主要直接供体。 A: 正确 B: 错误

真核生物合成初始出现在多肽链N端的氨基酸是（）。 A: methionine B: valine C: N-formylmethionine D: leucine E: isoleucine

An alternative method to methylate homocysteine to form methionine iswhich one of the following A: Using glycine and FH4 as the methyl dono B: Using dimethylglycine as the methyl dono C: Using choline as the methyl dono D: Using sarcosine as the methyl dono E: Using betaine as the methyl dono