Like Y-DNA STRs, autosomal STRs are counts of repeated genetic code. As autosomal DNA recombines each generation, the number of markers shared with a specific ancestor is reduced by half each generation.
Heroin acts as a lipid soluble âprodrugâ within the brain, meaning that heroin itself is inactive but it is metabolized into an active form within the body. After crossing the blood-brain barrier, heroin is metabolized into morphine, which actively binds to opiate receptors in the brain producing the high.
Heroin Facts. Heroin is processed from morphine, a naturally occurring opiate extracted from the seedpod of certain varieties of poppy plants. The opium poppy has been cultivated for more than five thousand years for a variety of medicinal uses. Heroin was first synthesized from morphine in 1874.From 1898 through to 1910, Bayer, the German pharmaceutical company, marketed it under the trademark name Heroin as a cough suppressant and as a non-addictive morphine substitute (until it was discovered that it rapidly metabolizes into morphine). This heroin may be sticky like roofing tar or hard like coal, with its color varying from dark brown to black. 2  Street heroin is rarely pure and may range from a white to dark brown powder of varying consistency.