2-14-56 Dear Josh, It was good to see you the other day and I hope St. Louis wasn't too fatiguing. We have tested the following cultures with 10-4M TMG and found the following results W2242 no detectable enzyme W2244 no detectable enzyme W481 about 1/50 enzyme of wild type W2241 about 1/50 enzyme of wild type So as you suggested W481 may be a [ . . . ]. I enclose some TMG and I am eager to learn what you find regarding the response of various mutants to TMG as compared with butyl-gal and others. (If you plan to do this.) Regards to Esther and happy St. Valentine Day Aaron