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Changes in density of DNA after interaction with dipicolinic acid and its possible role in spore heat resistance

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Abstract

We examined the effect of interacting dipicolinic acid and its calcium chelate on the wet and dry density of DNA. Complexes are produced whose densities are different from those of the individual components. Also, we observed two modes of binding, one strong the other weak, between DPA or CaDPA and DNA. The strength of the binding modes was reflected in the rate of dissolution of the complexes as monitored by changes in wet density with time and temperature. We conclude from these and other data in the literature that the interaction of dipicolinic acid with DNA not only influences the spore wet density and the ratio of core/core+ cortex volume, but may also influence the spore heat resistance.

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Authors and Affiliations

  1. CSIRO, Division of Food Research, 2113, North Ryde, NSW, Australia

    James A. Lindsay

  2. Department of Microbiology, University of Sydney, NSW, Australia

    William G. Murrell

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  1. James A. Lindsay
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  2. William G. Murrell
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Lindsay, J.A., Murrell, W.G. Changes in density of DNA after interaction with dipicolinic acid and its possible role in spore heat resistance. Current Microbiology 12, 329–333 (1985). https://doi.org/10.1007/BF01567892

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