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Alpha solenoid
An alpha solenoid (sometimes also known as an alpha horseshoe or as stacked pairs of alpha helices, abbreviated SPAH) is a protein fold composed of repeating alpha helix subunits, commonly helix-turn-helix motifs, arranged in antiparallel fashion to form a superhelix.
Society for the Preservation and Advancement of the Harmonica
The Society for the Preservation and Advancement of the Harmonica (SPAH) is a 501(c)(3) non-profit corporation dedicated to players of the harmonica.
See SPAH and Society for the Preservation and Advancement of the Harmonica

