A feeding experiment with 13C-labeled precursors was conducted in the dual cultures of Trichoderma harzianum H14 and Catharanthus roseus callus to determine the biosynthetic origin of the carbon atoms in trichosetin. Results showed that trichosetin originated from two separate biogenetic units. One unit is an octaketide intermediate directly derived from eight intact acetate units joined in a head-to-tail
在哈茨木霉H14和长春花愈伤组织的双重培养物中进行了13种C标记前体的摄食实验,以确定曲霉菌素中碳原子的
生物合成来源。结果表明,曲霉毒素源自两个不同的
生物遗传单位。一个单元是一种八肽中间体,直接从八个完整的
乙酸酯单元衍生而来,它们以首尾相接的方式连接到聚酮化合物途径中。另一个单元是
丝氨酸。