Converse of object

• call: Homocysteine is a highly toxic compound made in the body from a protein building block called methionine.

Preposition: at

• codon: They were noted also to be homozygous for methionine at codon 129.

Adjective modifier

• oral: If vomiting is not a problem, oral methionine may be a suitable alternative for remote areas, outside hospital.

• essential: Homocysteine, a normal breakdown product of the essential amino acid methionine, is believed to exert several toxic effects.

Modifies a noun

• homozygote: One methionine homozygote French case of variant CJD has been identified.

• synthase: In 1994 details of the binding site of methionine synthase from Escherichia coli were revealed.

• biosynthesis: The specific features of methionine biosynthesis and metabolism in plants.

• content: The extent to which consumption of these foods affects the risk of heart disease as a result of their methionine content remains unknown.

Noun used with modifier

• amino: SAMe is a natural compound obtained from the amino acid methionine, which is found in every cell in your body.

• acid: SAMe is a natural compound obtained from the amino acid methionine, which is found in every cell in your body.

• s-adenosyl: S-adenosyl methionine ( SAMe ) is a substance synthesized in the body that has recently been made available as a supplement.

Preposition: in

• presence: Homocysteine is converted into the amino acid methionine in the presence of B12.