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Protein expression of NOS1 splice variants in human cortical and medullary homogenates by Western blot analysis. A: five different human samples (see methods for demographic information) express both NOS1α (155 kDa) and NOS1β (130 kDa). B: COS7 cells transfected with either NOS1α or NOS1β as a positive control for the COOH-terminal, NOS1-specific antibody.
