Photodynamic effect of 3,4-benzpyrene on thermo-sensitive mutants of Escherichia coli B.

Results obtained with thermo-sensitive mutants of Escherichia coli B have shown that the presence of a protein with impaired structure may be responsible for enhanced sensitivity to the lethal photodynamic effect of 3,4-benzpyrene. Thus, the evidence has been obtained of the in vivo action of excited 3,4-benzpyrene on proteins.