. Biochemical systematics. Biochemical variation; Botany. O OH tropolone Certain tropolone derivatives (for example, puberulonic and stipitatic acids) have been described from the culture media of Peni- cillium species, but chemically they are quite distinct from tropolones of vascular plants. The hmited distribution of tropolone compounds plus the somewhat unusual seven-carbon tropolone nucleus itself combine to generate particular interest in the question of the biosynthesis of these compounds. Present knowledge of their synthesis is based principally upon the results of labehng experiments,
. Biochemical systematics. Biochemical variation; Botany. O OH tropolone Certain tropolone derivatives (for example, puberulonic and stipitatic acids) have been described from the culture media of Peni- cillium species, but chemically they are quite distinct from tropolones of vascular plants. The hmited distribution of tropolone compounds plus the somewhat unusual seven-carbon tropolone nucleus itself combine to generate particular interest in the question of the biosynthesis of these compounds. Present knowledge of their synthesis is based principally upon the results of labehng experiments, utiHzing C^^, followed by proposals for hypothetical mechanisms analogous to some which have been established for other substances of biological origin. Ferretti and Richards (1960), utiHzing C^^ labeled acetate, formate, and glucose, have concluded that carbons 3, 5, 8, and either 1 or 7 are derived from the two-carbon of acetate while carbons 2, 4, and 5 arise from the carboxyl of acetate. OH. 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 Alston, Ralph E; Turner, B. L. (Billie Lee), 1925-. Englewood Cliffs, N. J. , Prentice-Hall
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbotany
