Tissue expression patterns of human hCB2A and hCB2B isoforms: A. human hCB2A isoform expression in different brain regions and peripheral tissues using human intestine hCB2A as a reference; B. human hCB2B isoform expression in different brain regions and peripheral tissues using human intestine hCB2B as a reference; C. human hCB2A isoform expression patterns using human intestine hCB2B as a reference. Error bars were derived from standard deviation (SD) of triplicate TaqMan assay. The abbreviations for brain regions and peripheral tissues are AMG: amygdala, CAU: caudate, PUT: putaman, NAC: nucleus acumbens, SNR: substantia nigra, CTX: cortex, CER: cerebellum, HIP: hippocampus, HRT: heart, LUN: lung, LIV: liver, INT: intestine, SPL: spleen, KID: kidney, TES: testis, MUS, muscle, and LEU: leukocytes.