A deep dive timeline into major case studies, experimental breakthroughs, and paradigm shifts in Molecular Biology & DNA Architecture, spanning from early genetic ideas to modern CRISPR and sequencing technologies.
Gregor Mendel presents his experiments on pea plants, establishing the fundamental laws of inheritance. #genetics #biology
Friedrich Miescher isolates a new substance from the nuclei of white blood cells, which he calls 'nuclein', now known as DNA. #DNA #history
Theodor Boveri and Walter Sutton independently propose that chromosomes carry hereditary units, laying the foundation for cytogenetics. #genetics #chromosomes
Frederick Griffith discovers a 'transforming principle' that can transfer genetic traits between bacteria, hinting at DNA as the genetic material. #bacteria #transformation
Oswald Avery and colleagues demonstrate that DNA is the transforming principle, providing the first direct evidence that DNA carries genetic information. #DNA #genetics
Erwin Chargaff discovers that in DNA, the amount of adenine equals thymine and guanine equals cytosine, crucial for the double helix model. #DNA #biochemistry
Rosalind Franklin captures X-ray diffraction image Photo 51, providing key evidence for the helical structure of DNA. #xraycrystallography #DNA
Alfred Hershey and Martha Chase confirm that DNA, not protein, is the genetic material using bacteriophages. #virology #molecularbiology
James Watson and Francis Crick publish the double helix model of DNA, revolutionizing molecular biology. #DNA #structure
Matthew Meselson and Franklin Stahl demonstrate that DNA replication is semi-conservative using isotopic labeling. #DNAreplication #molecularbiology
Marshall Nirenberg and Heinrich Matthaei demonstrate that the codon UUU codes for phenylalanine, beginning the deciphering of the genetic code. #geneticcode #translation
François Jacob and Jacques Monod propose the existence of messenger RNA (mRNA) as the intermediate between DNA and protein. #RNA #genetics
G.N. Ramachandran develops the Ramachandran plot, a powerful tool for visualizing allowed protein backbone conformations. #biophysics #proteinstructure
Har Gobind Khorana synthesizes the first complete gene and confirms the triplet nature of the genetic code. #genetics #biochemistry
DNA ligase, an enzyme that joins DNA strands, is discovered, enabling recombinant DNA technology. #enzymes #molecularbiology
Reiji and Tsuneko Okazaki discover discontinuous DNA replication fragments on the lagging strand, now called Okazaki fragments. #DNAreplication #japan
Hamilton Smith and Kent Wilcox isolate the first restriction enzyme, HindII, enabling precise DNA cutting. #biotechnology #enzymes
Howard Temin and David Baltimore independently discover reverse transcriptase in retroviruses, enabling RNA to DNA conversion. #virology #molecularbiology
Paul Berg creates the first recombinant DNA molecule by combining DNA from different species, launching genetic engineering. #geneticengineering #biotechnology
Frederick Sanger introduces the 'dideoxy' chain-termination method for DNA sequencing, later used for the Human Genome Project. #biotechnology #sequencing
Genentech, the first biotechnology company, is founded by Robert A. Swanson and Herbert Boyer to produce human proteins using recombinant DNA. #biotech #industry
Phillip Sharp and Richard Roberts independently discover split genes (introns) and RNA splicing in adenovirus. #molecularbiology #genetics
Thomas Cech and Sidney Altman independently discover that RNA can act as a catalyst (ribozyme), challenging the protein-only dogma. #RNA #catalysis
Kary Mullis develops the polymerase chain reaction (PCR) technique, exponentially amplifying specific DNA sequences. #biotechnology #PCR
Elizabeth Blackburn and Carol Greider identify telomeres and the enzyme telomerase, unraveling chromosome end replication. #aging #genetics
Applied Biosystems introduces the first automated DNA sequencer, accelerating genome projects. #sequencing #technology
An international consortium begins the Human Genome Project to sequence the entire human genome, completed in 2003. #genomics #research
The entire genome of Haemophilus influenzae is sequenced by J. Craig Venter's team, the first complete genome of a free-living organism. #genomics #bacteria
Andrew Fire and Craig Mello discover RNA interference (RNAi), a mechanism for gene silencing by double-stranded RNA. #RNAi #genetics
The Human Genome Project and Celera Genomics jointly announce a draft sequence of the human genome. #genomics #milestone
The Human Genome Project finishes sequencing the entire human genome, two years ahead of schedule. #genomics #achievement
454 Life Sciences launches the first next-generation DNA sequencer, massively increasing sequencing speed and reducing cost. #sequencing #innovation
Paul Rothemund introduces DNA origami, a method for creating nanoscale shapes using self-assembling DNA strands. #nanotechnology #DNA
Shinya Yamanaka discovers that somatic cells can be reprogrammed into pluripotent stem cells (iPSCs) using four transcription factors. #stemcells #regenerativemedicine
Techniques for sequencing the genome of a single cell are developed, enabling analysis of heterogeneous cell populations. #genomics #singlecell
Emmanuelle Charpentier and Jennifer Doudna publish the use of CRISPR-Cas9 as a programmable gene-editing tool, revolutionizing molecular biology. #CRISPR #geneediting
The high-resolution structure of the nucleosome core particle is solved, providing detailed insights into chromatin organization. #chromatin #structuralbiology
The UK approves and pioneers mitochondrial replacement therapy to prevent inherited mitochondrial diseases. #genetherapy #ethics
He Jiankui announces the birth of the first gene-edited babies using CRISPR, sparking worldwide ethical debate. #CRISPR #ethics
Emmanuelle Charpentier and Jennifer Doudna win the Nobel Prize in Chemistry for developing CRISPR-Cas9 gene editing. #award #CRISPR
The Telomere-to-Telomere consortium publishes the first complete, gapless sequence of a human genome. #genomics #human
CRISPR-based rapid diagnostic tests for SARS-CoV-2 are developed and deployed, showcasing the versatility of gene-editing tools. #diagnostics #pandemic