Stanley Norman Cohen is an American geneticist. For a non-technical introduction to the topic, please see Introduction to genetics. ...

Originally from Perth Amboy, New Jersey, Cohen is a graduate of Rutgers University, and received his doctoral degree from the University of Pennsylvania School of Medicine in 1960. Following subsequent training at various institutions, including the National Institutes of Health, he joined the faculty of Stanford University in 1968. The Perth Amboy National Bank Building, and a view of the 5 Corners downtown area (Intersections of State and Smith Sts. ... Rutgers redirects here. ... This article is about the private university in Philadelphia. ... 1960 (MCMLX) was a leap year starting on Friday (the link is to a full 1960 calendar). ... The National Institutes of Health (NIH) is the primary agency of the United States government responsible for medical research. ... The Leland Stanford Junior University, commonly known as Stanford University (or simply Stanford), is a private university located approximately 37 miles (60 kilometers) southeast of San Francisco and approximately 20 miles northwest of San José in an unincorporated area of Santa Clara County. ... 1968 (MCMLXVIII) was a leap year starting on Monday. ...

It was there that he began to explore the field of bacterial plasmids. He wanted to understand how the genes of plasmids could make bacteria resistant to antibiotics. In 1972, Cohen's investigations, combined with those of Herbert Boyer, led to the development of methods to combine and transplant genes. This discovery signalled the birth of genetic engineering, and he received National Medal of Science(1988) in his honor. Today, Cohen is a professor of genetics and medicine at Stanford, where he works on a variety of scientific problems including cell growth and development. Phyla Actinobacteria Aquificae Chlamydiae Bacteroidetes/Chlorobi Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Lentisphaerae Nitrospirae Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Verrucomicrobia Bacteria (singular: bacterium) are unicellular microorganisms. ... Figure 1: Schematic drawing of a bacterium with plasmids enclosed. ... Staphylococcus aureus - Antibiotics test plate. ... 1972 (MCMLXXII) was a leap year starting on Saturday. ... Herbert (Herb) Boyer (born 1936) is a Co-recipient of the 1996 Lemelson-MIT Prize and a co-founder of Genentech. ... An iconic image of genetic engineering; this autoluminograph from 1986 of a glowing transgenic tobacco plant bearing the luciferase gene, illustrating the possibilities of genetic engineering. ... National Medal of Science The National Medal of Science, also called the Presidential Medal of Science, is an honor given by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral and social... 1988 (MCMLXXXVIII) was a leap year starting on Friday of the Gregorian calendar. ...

Experiment

Stanley Cohen and Herbert Boyer made what would be one of the first genetic engineering experiments, in 1973. They demonstrated that the gene for frog ribosomal RNA could be transferred into bacterial cells and expressed by them. First they constructed a plasmid, which would be the vector, called pDC101. This plasmid contained a single site for the restriction enzyme EcoR1 and a gene for tetracycline resistance. The restriction enzyme EcoR1 was used to cleave the frog DNA into small segments. Next, the frog DNA fragments were combined with the plasmid, which had also been cleaved with EcoR1. The sticky ends of the DNA segments aligned themselves and were afterwards joined together using DNA ligase. The plasmids were then transferred into a strain of E. coli and plated onto a growth medium containing tetracycline. The cells that incorporated the plasmid carrying the tetracycline gene grew and formed a colony of bacteria. Some of these colonies consisted of cells that carried the frog ribosomal RNA gene. The scientists then tested the colonies that formed after growth for the presence of frog ribosomal DNA. Herbert (Herb) Boyer (born 1936) is a Co-recipient of the 1996 Lemelson-MIT Prize and a co-founder of Genentech. ... An iconic image of genetic engineering; this autoluminograph from 1986 of a glowing transgenic tobacco plant bearing the luciferase gene, illustrating the possibilities of genetic engineering. ... 1973 (MCMLXXIII) was a common year starting on Monday. ... For other meanings of this term, see gene (disambiguation). ... Distribution of frogs (in black) Suborders Archaeobatrachia Mesobatrachia Neobatrachia - List of Anuran families The frog is an amphibian in the order Anura (meaning tail-less from Greek an-, without + oura, tail), formerly referred to as Salientia (Latin saltare, to jump). ... Figure 1: Ribosome structure indicating small subunit (A) and large subunit (B). ... This article or section does not adequately cite its references or sources. ... Figure 1: Schematic drawing of a bacterium with plasmids enclosed. ... Look up vector in Wiktionary, the free dictionary. ... A restriction enzyme (or restriction endonuclease) is an enzyme that cuts double-stranded DNA. The enzyme makes two incisions, one through each of the phosphate backbones of the double helix without damaging the bases. ... In molecular biology, EcoR1 (sometimes spelled with a roman one as in EcoRI) is a commonly used restriction enzyme. ... In biology, sticky end and blunt end are the two possible configurations resulting from the breaking of double-stranded DNA. DNA exhibits a stabilizing interaction between complementary base pairs, providing specificity to the pairing of two strands of DNA. If two complementary strands of DNA are of equal length, then...

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External links

• Flash animation at McGraw-Hill genetics-Genetic%20Engineering

The McGraw-Hill Companies logo. ...

References

• Biography — A page of short biographical sketches of various figures in genetics.