Anonymous ID: 85802e Oct. 25, 2021, 12:59 a.m. No.14853022   🗄️.is đź”—kun   >>3140 >>3146 >>3349 >>3380

>>14853013

An organism\'s genome is stored inside DNA molecules, but analyzing this genetic information requires quite a large amount of DNA. In 1985, Kary Mullis invented the process known as polymerase chain reaction (PCR), in which a small amount of DNA can be copied in large quantities over a short period of time. By applying heat, the DNA molecule\'s two strands are separated and the DNA building blocks that have been added are bonded to each strand. With the help of the enzyme DNA polymerase, new DNA chains are formed and the process can then be repeated. PCR has been of major importance in both medical research and forensic science.

 

https://www.nobelprize.org/prizes/chemistry/1993/mullis/facts/

 

In the 35 years since its invention, polymerase chain reaction (PCR) has become a standard technique in laboratory biology, but scientists continue to find groundbreaking—and even life-saving—applications for it.

 

In May 1983, Kary Mullis, then a scientist at the Cetus Corporation in Emeryville, California, synthesized some oligonucleotides, mixed them with a small amount of template DNA, and added a polymerase enzyme and a few other reagents. After a series of incubations, the polymerase had copied the template many times over in a chain reaction, just as Mullis had hoped.

 

https://www.science.org/content/article/pcr-thirty-five-years-and-counting

 

Kary Mullis invented the PCR technique in 1985 while working as a chemist at the Cetus Corporation, a biotechnology firm in Emeryville, California. The procedure requires placing a small amount of the DNA containing the desired gene into a test tube. A large batch of loose nucleotides, which link into exact copies of the original gene, is also added to the tube. A pair of synthesized short DNA segments, that match segments on each side of the desired gene, is added. These "primers" find the right portion of the DNA, and serve as starting points for DNA copying. When the enzyme Thermus aquaticus (Taq) is added, the loose nucleotides lock into a DNA sequence dictated by the sequence of that target gene located between the two primers.

 

http://siarchives.si.edu/research/videohistory_catalog9577.html

Anonymous ID: 85802e Oct. 25, 2021, 5:46 a.m. No.14853493   🗄️.is đź”—kun

>>14853488

 

Migrant caravan pushes through Mexican forces to get to US border

 

Thomas Feeley, former director of NY ICE removals, warns the caravan of migrants is already demonstrating that they won't follow laws and says the ongoing crisis is what the Biden administration wants.

 

https://www.youtube.com/watch?v=CoDE-knep00