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Letter from Pierre Fredericq to Joshua Lederberg

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  • Biology


Ministkre de I’lnstructi’on publique UNIVERSITE DE LlEGE Microbiologic et Hygiene Likge, le February, 4, 1958 1, rue des Bonnes-Villes Prof. P. Fredericq Prof.J.Lederberg Department of Genetics University of W isoonsin Madison 6 W isconsin USA Dear Professor Lederberg, Thank you very much for your proposal for a lec- ture in Madison. I shall be very glad to do it. I think that I shall come to Madison around June 9 but my travel program is not yet definitely settled. I hope that the date will suit you. I am sorry to have made a distinction between Virus-liken and"plasmid-like". I really had overlooked the full meaning of the term plasmid. I am sending by the same mail phage BF.23 which isCluseful reagent to distinguish resistance and immunity to colicin E. Its host-strain is E.coli B that,1 am suresyou have. I include also a new sample of strain TR.27 as you did find the previous one to be streptomycin sensitive. This one is at least qualitatively resistant>for if you cross-streak it on a streak of streptomycin 10.000 /ml, Y there is no inhibition. I am very sincerely yours, Prof.P.Frederioq J

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