Letter | Published:

Photo-Sensitivity of Thiazine Leucobases

Naturevolume 191pages505506 (1961) | Download Citation



DURING the course of experiments designed to investigate the staining of nucleic acid in histological sections, I happened to gather together on one bench a number of solutions of basic dyes reduced to their colourless sulphite leucobase. These included methyl green, basic fuchsin and a series of thiazines, namely, thionin, azure A, B and C, and methylene blue (for a discussion of the structure of these thiazine dyes, see Baker1).

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  1. 1

    Baker, J. R., Principles of Biological Micro-Technique, 180, 268 (Methuen and Co., London, 1958).

  2. 2

    de Tomasi, J. A., Stain Technol., 11, 137 (1936).

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  1. Department of Pathology, University of Melbourne

    • D. W. MENZIES


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