Eye twitching, eyelid spasm and blepharospasm are terms used to refer to any of three separate conditions. They each have different causes, and one doesn't lead to the other. Eyelid twitching (myokymia) affects only the eyelid. It can involve either the upper or lower lid, but only one eye at a time. The eye twitching can range from barely noticeable to bothersome.
Recombinant DNA technology involves introducing genes from one organism into another organism. Scientists rely on this technology to produce the drug insulin, which people with diabetes need to manage their blood sugar levels. In the late 1970s, scientists figured out which human gene codes for the protein insulin. They were able to take the gene out of human DNA and insert it into a special type of bacterial DNA called a plasmid. Scientists then grew large cultures of the bacteria with the insulin gene, and the bacteria produced large quantities of insulin.
Recombinant DNA Technology. Recombinant DNA Technology. All organisms on Earth evolved from a common ancestor, so all organisms use DNA as their molecule of heredity. At the chemical level, DNA is the same whether it is taken from a microscopic bacterium or a blue whale.As a result, DNA from different organisms can be âcut and pastedâ together, resulting in ârecombinant DNAâ. The first recombinant DNA molecule was produced in 1972 by Stanford researcher Paul Berg.f the DNA from the different sources is cut with the same restriction enzyme, the cut ends can be joined together and then sealed into a continuous DNA strand by the enzyme ligase. In 1973, the first organism to contain recombinant DNA was engineered by Herb Boyer (UCSF) and Stanley Cohen (Stanford University).