The River Divides into Thousands of BranchesMain MenuPreface and AcknowledgmentsPart I: That the genetic material is DNA is established and becomes widely acceptedPart II: The structure of DNA reveals how the genetic material is duplicatedPart III: DNA is shown to be a linear code for proteinsPart IV: Genes are Shown to be RegulatedPart V: Messenger RNA is Discovered and the Genetic Code is CrackedPart VI: Three Technologies Revolutionized Molecular BiologyEpilogueAppendix: A Nobel Incubator
Meselson Stahl Nitrogen Isotope Test
12025-01-22T09:20:32-05:00George Shaohua Qiao78e5371050dd5c0e21d36bad469c70d8d4be54642251Results from Meselson and Stahl's isotope test. Generation 1.0 and 1.9 of bacterial DNA are boxed in red. In generation 1.0, only heavy-heavy (pure nitrogen 15) DNA exists. However, after mixing with bacteria with light-light (pure Nitrogen 14) DNA, generation 1.9 shows the emergence of hybrid light/heavy strands, evidence for semi-conservative replication.plain2025-01-22T09:20:32-05:00George Shaohua Qiao78e5371050dd5c0e21d36bad469c70d8d4be5464