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  1. NLM Digital Collections - The Structure of DNA 
    Publication: Johns Hopkins University. Press, 1956
    ... ratio of adenine /thymine and of guanine/cytosine —- 5-methyl cytosine are very close to unity for all sources ... the structure without difficulty. The smaller amount of 5-methyl cytosine which oceurs in the DNA of various organisms ...
  2. NLM Digital Collections - The Structure of DNA 
    Publication: Cold Spring Harbor Laboratory. Press, 1953
    ... thymine, and guanine only with cyto- sine (or 5-methyl-cytosine, or 5-hydroxy-methyl- cytosine). This pairing is ... adenine to thymine, and guanine to cyto- sine -+ 5-methyl cytosine appear to grow very close to unity. This ...
  3. ... are commonly present. In addition, a third pyrimidine 5-methyl-cytosine (Wyatt 1952) occurs in small amounts in certain ... The complementary structure of deoxyribonucleic acid 87 When 5-methyl cytosine is present it should also pair with guanine ...
  4. NLM Digital Collections - Tuberculosis : a bibliography of articles published as part of a cooperative investigation on ... 
    Publication: Washington : Federal Security Agency, U.S. Public Health Service, 1939
    ... D. Researches in pyrimidines. CIII. The discovery of 5-methyl- cytosine in tuberculinic acid, the nucleic acid of the ...
  5. ... be of four different types. (We have considered 5-methyl cytosine to be equivalent to cytosine, since either can ...
  6. ... logues!! (uracil, hypoxanthine, 5-bromouracil, 5-bromocytosine, and 5-methyl- cytosine) are incorporated enzymatically into DNA. In each case ...
  7. NLM Digital Collections - The Search for the Chemical Structure of DNA 
    Publication: Connecticut State Medical Society, October 1974
    ... rare” base termed epicytosine, later shown to be 5-methyl cytosine. ~ 36. Chargaff E: “Chemical Specificity of Nucleic Acids ...
  8. ... process, I discovered the first "exceptional" DNA base, 5-methyl-cytosine, in thymus DNA.) 4. By 1951 I could ...