The later stages of porphyrin biosynthesis.
D000818:Animals; D002250:Carbon Radioisotopes; D005055:Euglena / Q000378:metabolism; D007536:Isomerism; D007553:Isotope Labeling; D011166:Porphyrins / Q000096:biosynthesis*; D012242:Rhodobacter sphaeroides / Q000378:metabolism; D013045:Species Specificity; D013329:Structure-Activity Relationship; D014316:Tritium; D014805:Vitamin B 12 / Q000378:metabolism
D002250:Carbon Radioisotopes; D011166:Porphyrins; D014316:Tritium; D014805:Vitamin B 12