Northern blot analysis of the human γ
, and γ
mRNA transcripts. A. Human multiple-tissue northern blots revealed that the γ2, γ3, and γ4 are exclusively detected in the brain. B & C. Brain region blots determined that the γ2 and γ4 are almost ubiquitously expressed, but at differential levels in the same tissues. γ3 is more specifically localized to cerebral cortex, amygdala, caudate nucleus and hippocampus. Size markers were from an RNA ladder provided on the blot by BD Biosciences Clontech and the β-actin control probe results are displayed in the bottom panels.