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INACTIVATION OF T4 BACTERIOPHAGE BY NEAR ULTRAVIOLET LIGHT IN THE PRESENCE OF 8‐METHOXYPSORALEN
Author(s) -
Suzuki Kenshi,
Yanagisawa Fukuko,
Fujita Hitoshi,
Ohkido Muneo
Publication year - 1978
Publication title -
the journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 65
eISSN - 1346-8138
pISSN - 0385-2407
DOI - 10.1111/j.1346-8138.1978.tb01043.x
Subject(s) - bacteriophage , monochromatic color , ultraviolet light , ultraviolet , mutant , fluorescence , photochemistry , chemistry , biophysics , optoelectronics , physics , biology , optics , escherichia coli , biochemistry , gene
The killing action of near ultraviolet light emitted from a fluorescent black‐light lamp in the presence of 8‐methoxypsoralen was investigated using bacteriophage T4D and its mutants. It was found that a far ultraviolet‐sensitive mutant, T4 v , was no more sensitive to the present photoreaction than the wild type. T4 px and T4 y were a little more sensitive than T4D. Contrary to the results of illumination with monochromatic light, exponential survival curves with pronounced shoulders were obtained. The reason for this finding is discussed on the basis of the mode of photoreaction.