Northern blot of RNAs isolated from adult murine organs. Lane 1, undifferentiated FDCP-Mix cells; lane 2, lung; lane 3, liver; lane 4, heart; lane 5, thymus; lane 6, small intestine; lane 7, bone marrow; lane 8, spleen; lane 9, kidney; lane 10, brain; and lane 11, testis probed with labeled 3′ specific serpin 2A cDNA fragment.