Studies on the mechanism of rubber formation in the guayule. III. Experiments with isotopic carbon
Por:
Arreguin B., Bonner J., Wood B.J.
Publicada:
1 ene 1951
Resumen:
1. 1. In earlier experiments it has been shown that acetate can serve as a substrate for support of increased rubber synthesis in guayule seedlings or excised guayule tissues. It has now been shown by the use of acetate labeled with isotopic carbon that the carbon from exogenous acetate is actually incorporated in the rubber formed by guayule. 2. 2. When acetate is given and taken up by guayule in great excess, the specific radioactivity of the rubber formed approaches that of the acetate given. Under such conditions apparently the exogenous acetate serves as the principal substrate for rubber synthesis. 3. 3. Acetate is metabolized by guayule tissues through a variety of pathways. Synthesis to rubber constitutes a pathway of only minor importance. Synthesis to other isoprenoid compounds, the resins, is a second pathway of quantitative significance. Half or more of the acetate given is however metabolized to amino acids, in particular to the branched-chain amino acids leucine and valine on the one hand and the dicarboxylic amino acids aspartate and glutamate on the other. © 1951.
Filiaciones:
Arreguin B.:
From the Kerkhoff Laboratories of Biology, California Institute of Technology, Pasadena, CaliforniaU.S.A
Bonner J.:
From the Kerkhoff Laboratories of Biology, California Institute of Technology, Pasadena, CaliforniaU.S.A
Wood B.J.:
From the Kerkhoff Laboratories of Biology, California Institute of Technology, Pasadena, CaliforniaU.S.A
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