3-iodotyrosine 3-iodotyrosine 3-iodotyrosine is an intermediate in the synthesis of thyroid hormones which is derived from iodination of tyrosine at the meta-position of the benzene ring. one unit can combine with diiodotyrosine to form triiodothyronine, as occurs in the colloid of the thyroid follicle. two units can combine to form 3,3'-diiodothyronine. 3-iodotyrosine 3-iodo-l-tyrosine names iupac name (2s)-2-amino-3-(4-hydroxy-3-iodophenyl)propanoic acid other names monoiodotyrosine; mit identifiers cas number 3078-39-5 (dl) y70-78-0 (l)25799-58-0 (d) 3d model (jsmol) interactive image chembl chembl479789 y chemspider 388804 n drugbank db01758 y echa infocard 100.000.677 iuphar/bps 5117 mesh monoiodotyrosine pubchem cid 6272 (dl)439744 (l) unii frq98u4u27 y comptox dashboard (epa) dtxsid1075353 inchi inchi=1s/c9h10ino3/c10-6-3-5(1-2-8(6)12)4-7(11)9(13)14/h1-3,7,12h,4,11h2,(h,13,14)/t7-/m0/s1 nkey: uqtzmgftrhfaam-zetcqymhsa-n ninchi=1/c9h10ino3/c10-6-3-5(1-2-8(6)12)4-7(11)9(13)14/h1-3,7,12h,4,11h2,(h,13,14)/t7-/m0/s1key: uqtzmgftrhfaam-zetcqymhby smiles c1cc(c(cc1c(c(=o)o)n)i)o properties chemical formula c9h10ino3 molar mass 307.087 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references 3-iodotyrosine is a reversible inhibitor of the enzyme tyrosine hydroxylase. relevance in dopamine studies 3-iodotyrosine, a pathway inhibitor in the synthesis of the neurotransmitter dopamine, was used to determine the effects of decreased dopamine levels in social spacing of drosophila melanogaster. 3-4 day old flies that were fed 3-iodotyrosine for 24 hours were shown to have altered dopamine levels.