History of genetics of the fruit fly "Drosophila melanogaster". In 1928, Frederick Griffith showed that genes could be transferred. In what is now known as Griffith's experiment, injections into a mouse of a deadly strain of bacteria that had been heat-killed transferred genetic information to a safe strain of the same bacteria, killing the mouse. A series of subsequent discoveries led to the realization decades later that the genetic material is made of DNA (deoxyribonucleic acid). In 1941, George Wells Beadle and Edward Lawrie Tatum showed that mutations in genes caused errors in specific steps in metabolic pathways. This showed that specific genes
Docosapentaenoic acid omega-3 fats in humans, such as in inflammation mechanisms. Docosapentaenoic acid Docosapentaenoic acid (DPA) designates any straight chain 22:5 fatty acid, that is a straight chain open chain type of polyunsaturated fatty acid (PUFA) which contains 22 carbons and 5 double bonds. DPA is primarily used to designate two isomers, "all"-"cis"-4,7,10,13,16-docosapentaenoic acid (i.e. 4"Z",7"Z",10"Z",13"Z",16"Z"-docosapentaenoic acid) and "all"-"cis"-7,10,13,16,19-docosapentaenoic acid (i.e. 7"Z",10"Z",13"Z",16"Z",19"Z"-docosapentaenoic acid). They are also commonly termed n-6 DPA and n-3 DPA, respectively; these designations describes the position of the double bond being 6 or 3 carbons closest to the (omega) carbon at the methyl end of the molecule and is