. Ciba Foundation conferences on istopes in biochemistry;. Radioactive tracers in biochemistry; Isotopes -- Physiological effect. Biosynthesis of Porphyrins 43 In 1945 it was found that glycine was the nitrogenous precursor of the porphyrin (Shemin and Rittenberg, 1945, 1946). However, it was not estabhshed from these experi- SCHj 6CH3 3CH 9CH2 6CH38CH HEM!N. 5CH3 9CH2 eCH2 5CH3 3CH2 9CH2 'OCOOH lOCOOH PROTOPORPHYRIN IX. CH3 CH, METHYLETHYLMALEIMIDE COOH CH2 CH3 CH2 C*D O^^N^^O HEMATINIG ACID CO2 CC /O, 0 10) CH3 CHj CH3 c»i CMl__pH2 HC /^U^ H ^ • CH3 CH2 CH2 CH, COOH CCOH MESOPORPHYRIN. Pleas
. Ciba Foundation conferences on istopes in biochemistry;. Radioactive tracers in biochemistry; Isotopes -- Physiological effect. Biosynthesis of Porphyrins 43 In 1945 it was found that glycine was the nitrogenous precursor of the porphyrin (Shemin and Rittenberg, 1945, 1946). However, it was not estabhshed from these experi- SCHj 6CH3 3CH 9CH2 6CH38CH HEM!N. 5CH3 9CH2 eCH2 5CH3 3CH2 9CH2 'OCOOH lOCOOH PROTOPORPHYRIN IX. CH3 CH, METHYLETHYLMALEIMIDE COOH CH2 CH3 CH2 C*D O^^N^^O HEMATINIG ACID CO2 CC /O, 0 10) CH3 CHj CH3 c»i CMl__pH2 HC /^U^ H ^ • CH3 CH2 CH2 CH, COOH CCOH MESOPORPHYRIN. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ciba Foundation. Philadelphia, Blakiston
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