Adrenergic receptors are pharmacologically classified into the receptor types 1, 2, 1, 2, and 3. Structural differences and varying affinities in radioligand binding studies lead to a further classification of 1and 2-receptors into subtypes which are termed 1A (formerly 1C), 1B, and 1D (formerly 1AD), and 2AD, 2B, and 2C, respectively. mRNA expression of all but one -adrenergic receptor subtype...

Film receptor autoradiography was used to study the distribution of ml-, (r2-, and @-adrenergic receptors in the occipital lobe of developing rhesus monkeys ranging in age from the 65th embryonic day (E65) to adulthood (5 years of age). The study shows that each adrenergic receptor subtype has a unique distribution in the cortical plate and transient embryonic zones of the developing cerebral w...