Skip to main contentU.S. National Library of MedicineU.S. National Library of Medicine


Profiles in Science
   
Pinterest badge Follow Profiles in Science on Pinterest!

The Joshua Lederberg Papers

Title:
Letter from Martin Kristensen to Joshua Lederberg pdf (48,736 Bytes) transcript of pdf
Letter from Martin Kristensen to Joshua Lederberg
Description:
Item is handwritten.
Number of Image Pages:
1 (48,736 Bytes)
Date:
1948-01-09 (January 9, 1948)
Creator:
Kristensen, Martin
Statens Serum Institut
Recipient:
Lederberg, Joshua
Rights:
Reproduced with permission of the Statens Serum Institut.
Relation:
Lederberg Grouping: Correspondence B
Box Number: 7
Folder Number: 129
Unique Identifier:
BBAERV
Accession Number:
8
Document Type:
Letters (correspondence)
Language:
English
Format:
application/pdf
image/tif
Physical Condition:
Good
Series: Correspondence, 1935-2002
SubSeries: 1947-1953
Folder: Kristensen, Martin
Transcript:
1-9-48
Dear Dr. Lederberg
Many thanks for your letter of August 24 and the culture of L-type [ . . . ] L-21. When I have tested it, I will let you know my findings.
Under seperate corr I send the strain W 0459, 37-38 mutated[?] from blood, of L typhin[?] type 2 and for my experiments on the xylose-dulcitol relationship. I do not think this phenomenon is due to a [ . . . ] shift mutation in which the capacity to ferment one sugar is accompanied by the loss on another, and vice versa. The phase which does not ferment xylose grown on dulcitol medium as on the medium without dulcitol which the xylose-fermenting phase specifically inhibited by dulcitol. Perhaps this may be due to a fermentation of dulcitol without acid production by xylose of the original weakly fermenting form. I have shown cases of simultaneously acquired fermentation of more than one sugar, but no cases of shift-mutation you ask about.
Yours sincerely
Martin Kirstensen
Metadata Last Modified Date:
2017-03-23
Linked Data:
RDF/XML     JSON     JSON-LD     N3/Turtle     N-Triples