ce | Mare 10, 1948. ee a,
Dear Bs LENSES
: i enclose a short sheet desecihing some mutants just packed off. I - | bes |
meant to include ¥~93 ‘(a u.v. matant of Y-120 requiring as well as valine Les oe

my thesis in before Ost. i or thereabouts when ‘the Faculty Conai.ttes met”
= that there would be no further bil, registration ete. x asked Mr, Mer, .
ee : the bursar had refer to the © dopartaent £ for an | explanation, add returned the

dt da an artifact. It was gotten from wics “ele ~ Mal -,Lac~) by inoculating

noantning ZI haven't been able to track down yet) but until it is characterized ee
it can t be very much use anyhow: a te ee a

What is really troubling ms is a bill Just received from the Yale Bursar be
for $125 labelled "Tuition, Spring T." I understood that as "long as I had : oe

  
   
 

 

- Back to the mutants. W327 isa corker, den't 1t7! Vea fOlue. 1 I've checked oe
several tines, and the tests are done on comptate medium so I doubt if “e

into mal tose-synthetic medium, Most of the phenotypic reversions awe ‘Lae 37 .

and complete reverse mutations, but this one carries a suppressor mutatdon

(Lac, ~ Slo/) so that when crossed with wild type (Lac,/S1>~) it throws off

Mal- recombinants. (Lac3-Sl>~). I supppse that the new system developed is

phosphorylative, but haven't *hought yot how to Bs about proving same. ae e a nee

“ecards, ,
, aS ' . “stncereay,