The amount of a serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit alpha when measured in blood serum. The trait is OBA_2043008 (level of serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit alpha in blood serum). Also known as: blood serum serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit alpha amount.