BN-PAGE exhibiting multimeric states of AGPase. The gel was electroblotted and developed with polyclonal antibody raised against BT2. Arrows indicate the monomer, dimer, and tetrameric states of AGPase. All small subunits were expressed with the maize large subunit. Lane 1, Pss; lane 2, P2M2Pss; lane 3, MPss; lane 4, Mss.