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.
The heroin chemical structure is similar to that of 6-acetyl morphine and morphine. A further look at the heroin chemical structure, heroin's systematic IUPAC name is: (5?,6?)-7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol diacetate.