On the biosynthesis of lichen substances. 4. The formation of pulvic acid derivatives by isolated lichen fungi.
D002245:Carbon Dioxide / Q000378:metabolism; D002247:Carbon Isotopes; D008011:Lichens / Q000378:metabolism*; D010860:Pigments, Biological / Q000096:biosynthesis*
D002247:Carbon Isotopes; D010860:Pigments, Biological; D002245:Carbon Dioxide