Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search help
439 results
  1. NLM Digital Collections - Forty Years of Genetic Recombination in Bacteria: A Fortieth Anniversary Reminiscence 
    Publication: MacMillan Magazines, 18 December 1986
    resource.nlm.nih.gov/101584906X1007
    ... of luck was that, the selected markers Thr (threonine) and Leu (leucine) are found almost at the ...
  2. NLM Digital Collections - Letter from Joshua Lederberg to Edward L. Tatum 
    Publication: Produced: 25 October 1949
    resource.nlm.nih.gov/101584906X10238
    ... hitting a common suppressor mutation (e.g. for threonine and histidine), But we also have reassortment of ...
  3. NLM Digital Collections - Food from the World's Factories? 
    Publication: Washington Post Company, 15 July 1967
    resource.nlm.nih.gov/101584906X1107
    ... human nutrition; amino acids like lysine, tryptophan and threonine. Establishing such an industry would require a large ...
  4. NLM Digital Collections - A Tax on Nutrition 
    Publication: Washington Post Company, 5 August 1967
    resource.nlm.nih.gov/101584906X1110
    ... diets, food crops furnish insufficient quantities of lysine, threonine, tryptophan, and perhaps methionine and some other amino ...
  5. NLM Digital Collections - The Disease of Malnutrition 
    Publication: Washington Post Company, 29 July 1967
    resource.nlm.nih.gov/101584906X1109
    ... and life. Four of these amino acids, lysine, threonine, tryptophan and methionine, are especially critical since they ...
  6. NLM Digital Collections - Letter from Joshua Lederberg to Joseph Lein 
    Publication: Produced: 7 October 1959
    resource.nlm.nih.gov/101584906X11961
    ... we have Is a mutant derivative that requires threonine, leucine and thlamine. It should be lysogenic. We ...
  7. NLM Digital Collections - Genetic Recombination in Escherichia coli [Dissertation] (pages 26-42) 
    Publication: Produced: 1947
    resource.nlm.nih.gov/101584906X12497
    ... into medium lacking By but containing biotin, methionine, threonine and leucine, the B,- cells would be suppressed, ...
  8. NLM Digital Collections - Genetic Evidence for Sex in Bacteria 
    Publication: Produced: 7 December 1946
    resource.nlm.nih.gov/101584906X13150
    ... into agar containing thiamin, but lacking biotin, methiaine,threonine or leucine, the colonies which appear should represnt ...
  9. NLM Digital Collections - Instructions for Crossing Biochemical Mutants of Escherichia Coli K-12 
    Publication: Produced: January 1955
    resource.nlm.nih.gov/101584906X13147
    ... carries the fole lowing "markers": Te Le By= (threonine-s leuciness thiaminerequiring); Lace Mal- Mtl- Xyle Ara- (non- ...
  10. NLM Digital Collections - Postcard from Gordon Allen to Joshua Lederberg 
    Publication: Produced: 1 April 1950
    resource.nlm.nih.gov/101584906X1361
    ... Josh: One of our technicians made up a threonine solution at 0.1% instead of 1%, and ...
first · previous · 11 · 12 · 13 · 14 · 15 · 16 · 17 · 18 · 19 · 20 · next · last