Photochemical synthesis of biomolecules under anoxic conditions
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We report the long-wavelength UV anoxic photosynthesis of uracil, various sugars (including deoxyribose and glycoaldehyde), amino acids, and other organic photoproducts. These reactions occur in mixtures of water, calcium carbonate, formaldehyde and hydrazine. Our data demonstrate that under several sets of conditions biomolecules can be formed in variety and abundance from reduced compounds (formaldehyde and hydrazine) derived from anoxic dinitrogen/carbon dioxide environments. The formaldehyde concentrations were varied from 10 mM to 0.005 mM, and the hydrazine concentrations were varied from 1 mM to 0.01 mM. The highest of these reactant concentrations were 500 and 6 times greater than those reported for earlier experiments upon the synthesis of these precursors from CO2 or N2, while the lowest of reactant concentrations employed here were 0.5 (formaldehyde) and 0.006 (hydrazine). Product yields were greatest when the hydrazine/formaldehyde ratio was 1, and when the reactant concentrations were low. These data suggest that organic products can be formed in variety from those amounts of formaldehyde and hydrazine precursors which are themselves formed under anoxic UV photochemical conditions. Hence these various reactions would seem to have prebiotic relevance. The UV 254 nm photon flux employed was 100 times higher than unattenuated solar flux. Durations of UV exposure were 24 hrs and 72 hrs. No experiments have been addressed to the possibility of UV flux dependency.
- Burki, P. M., Glasser, L. S. D. and Smith, D. N.: 1982,Nature 297, 145.
- Chittenden, G. J. F. and Schwarz, A. W.: 1981,BioSystems 14, 15.
- Dische, Z. and Schwarz, K.: 1937,Microchim. Acta 2, 13.
- Folsome, C. E.: 1979,The Origin of Life, W. H. Freeman and Co., San Francisco.
- Folsome, C. E. and Brittain, A.: 1981,Nature 291, 482.
- Folsome, C. E., Brittain, A., Smith, A., and Chang, S.: 1981,Nature 294, 64.
- Folsome, C. E., Lawless, J. G., Romiez, M., and Ponnamperuma, C.: 1973,Geochim. Cosmochim. Acta 37, 455.
- Holland, H. D.: 1978,The Chemistry of the Atmosphere and Oceans, John Wiely & Sons, New York.
- Isaq, H. J. and Ban, E. W.: 1977,J. Chromatog. 132, 121.
- Levine, J. S., Boughner, R. E., and Smith, K. A.: 1980,Origins of Life 10, 199.
- Lisoba, B. P.: 1964,J. Chromatog. 16, 136.
- McLaren, A. D. and Shugar, D.: 1964,Photochemistry of Proteins and Nucleic Acids, Pergamon, New York.
- Peschke, W.: 1965,J. Chromatog. 20, 572.
- Ponnamperuma, C. and Mariner, R.: 1963,Radiation Res. 19, 183.
- Rubey, W. W.: 1955,Geol. Am. Spec. Pap. 62, 631.
- Simmonds, H. A.: 1969,Clinica Chim. Acta 23, 319.
- Stoks, P. G. and Schwartz, A. W.: 1979,Nature 282, 709.
- Urey, H. C.: 1952,The Planets, Yale University Press, New Haven, Connecticut.
- Walker, J. C. G.: 1977,Evolution of the Atmosphere, Macmillan, New York.
- West, M. A. and Ponnamperuma, C.: 1970,Space Life Sci. 2, 225.
- Wright, M. E. and Satchell, D. G.: 1971,J. Chromatog. 55, 413.
- Photochemical synthesis of biomolecules under anoxic conditions
Origins of life
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