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Unformatted text preview: ribonucleosides animals were composed of deoxyribonucleosides, and Walter Jones (1920) deoxyribonucleosides concluded in his monograph on nucleic acids, that "...there are but two nucleic acids in nature, one obtainable from the nuclei of animal cells, and the other from the nuclei of plant cells." Yeast Nucleic Acid and Thymonucleic Acid
Thus plant nucleic acids were Thus known as either “yeast nucleic acid” acid” or ribonucleic acid, and animal ribonucleic nucleic acids were known as “thymonucleic acid” or acid” desoxyribonucleic acid. desoxyribonucleic The chemist’s interpretations of the The chemist’ simplicity of nucleic acids resulted from their preconceived notions preconceived of the simplicity of nucleic acids, and thus they developed inadequate extraction inadequate procedures. Conclusion: Nucleic Acids were Simple Conclusion: Molecules
Phoebus Levene (1921) Phoebus concluded that nucleic acids were composed of repeating repeating units of four nucleotides. According to the According tetranucleotide hypothesis...
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