title: Biosynthesis of radiolabeled phomopsin by Phomopsis leptostromiformis.
abstract: [14C]phomopsin and [36Cl]phomopsin were synthesized by Phomopsis leptostromiformis in liquid cultures containing various labeled compounds. [U-14C]isoleucine, [U-14C]phenylalanine, and [U-14C]proline were the best precursors in terms of labeling efficiency, whereas [36Cl]hydrochloride was much less efficient. When each of the four precursors was used, a large proportion of recovered label was associated with phomopsin. The specific activities of phomopsin produced with labeled isoleucine, phenylalanine, proline, and hydrochloride were 150, 120, 90, and 17 muCi/mmol, respectively. 14C label from acetate, malate, propionate, sucrose, or tryptophan was neither specifically nor efficiently incorporated into phomopsin.
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D002250:Carbon Radioisotopes; D006851:Hydrochloric Acid / Q000378:metabolism; D007532:Isoleucine / Q000378:metabolism; D003904:Mitosporic Fungi / Q000378:metabolism*; D009183:Mycotoxins / Q000096:biosynthesis*; D010649:Phenylalanine / Q000378:metabolism; D011392:Proline / Q000378:metabolism
chemical_list: D000596:Amino Acids; D002250:Carbon Radioisotopes; D009183:Mycotoxins; D007532:Isoleucine; D010649:Phenylalanine; D011392:Proline; D006851:Hydrochloric Acid