<prompt> Haemoglobin synthesis starts with?GlycineHistidineIronFolic acid  <response>: ANSWER: A GlycineREF: Harper 26th e p. 271-275Steps of porphyrin ring synthesis:EnzymeLocationSubstrateProductporphyriaALA synthaseMitochondrionGlycine, sucdnyl CoAD-Aminolevoilinic acidnoneALA dehydrataseCytosolD-Aminolevulinic acidPorphobilinogenALA-DehydratasedeficiencyPEG deaminaseCytosolPorphobilinogenHydroxymethyl bilaneAcuteintermittentporphyriaUroporphyrinogen III synthaseCytosolHydroxymethyl bilaneUroporphyrinogen IIICongenitalerythropoieticporphyriaUroporphyrinogen III decarboxylaseCytosolUroporphyrinogen IIICoproporphyrinogen IIIPorphyria cutanea tardaCoproporphyrinogen III oxidaseMitochondrionCoproporphvrinogen IIIProtoporphyrinogen IXCoproporphyriaProtoporphyrinogenoxidaseMitochondrionProtoporphyrmogen IXProtoporphyrin IXVariegateporphyriaFerrochelataseMitochondrionProtoporphyrin IXHemeErythropoieticprotoporphyriaHeme synthesis--note that some reactions occur in the cytoplasm and some in the mitochondrion yellow 