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Mechanism of uptake of 123I-MIBG, an analogue of norepinephrine, in presynaptic sympathetic nerve terminals (adapted from Rogers et al.) [84] {catechol-O-methyl transferase = COMT; normetanephrine = NMN; alpha- and beta-adrenergic receptor subtypes = α-, β-R and α2c; norepinephrine transporter 1 = NET1}.
