Beet te | 5 . -
| . cy Penruary 13, 1947, I cfossed Y-41 §38-189-1 1) with the foltoring and
- recovered no prototrophs: a | wo a wiles
58 32k, 6177, 3232, 6049, 6317, 5450, 5255, which, since these stocks oo
; reconbined with 679-662 to give prototrophs, suggests that they are all
| _Fecurrences of omtations at the same locus. I have similar syntrophiam data. | -
‘This 4s about the only series of tests that were made. I did not do many - ao
“et the ethionine series, and none of the other requirements recurred to any |
/ ‘extent. 1 don't think any of the other work was done completely enough to ~
a “be | woth tabulating or referring to, anes you have _sonething specific An mind,”

aaa

Ee sae = He
IL ‘talk to you ‘about at next month, of. course you ‘ean refer ‘to Hs as mL ate

  

 

unpab, ‘sg you like, since it was done at OBL... | AS .
| “Please send ons cop. of the thesis presto. I have to study tt, you kaon, mS e oe
pee regards, .

at
fo.

  

P.S. Tell Dave Sbocds that Barbara Wright w was asking g/ bout hin,

_ PSII I have som B.-

a ‘thiazole ada pyrimidine, which, as T recall you were out

” of. Taterested?