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Related Experiment Videos

Bile pigment formation in plants.

R F Troxler, A Brown, R Lester

    Science (New York, N.Y.)
    |January 9, 1970
    PubMed
    Summary

    The alga Cyanidium caldarium produces carbon monoxide and phycocyanobilin together. This suggests a similar bile pigment formation process in plants and mammals.

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    Area of Science:

    • Biochemistry
    • Phycology
    • Plant Physiology

    Background:

    • Bile pigments, like phycocyanobilin, are important in various biological processes.
    • The biosynthesis pathway of phycocyanobilin, particularly in algae, is not fully understood.
    • Previous studies have hinted at potential byproducts during pigment synthesis.

    Purpose of the Study:

    • To investigate the byproducts of phycocyanobilin synthesis in the alga Cyanidium caldarium.
    • To determine if carbon monoxide is produced during this process.
    • To compare the bile pigment formation mechanism in this alga with that in mammals.

    Main Methods:

    • Culturing of the unicellular alga Cyanidium caldarium.
    • Analysis of gas evolution during pigment synthesis.
    • Quantification of phycocyanobilin and carbon monoxide production.

    Main Results:

    • Carbon monoxide (CO) was evolved during the synthesis of phycocyanobilin.
    • CO and phycocyanobilin were produced in stoichiometric amounts.
    • The rates of production for both substances were comparable.

    Conclusions:

    • The biosynthesis of bile pigments in Cyanidium caldarium involves the evolution of carbon monoxide.
    • The mechanism of bile pigment formation in this alga shares similarities with that observed in mammals.
    • This finding provides a crucial link between plant and animal pigment biochemistry.

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