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Silver-stained gel from SDS-PAGE demonstrating bovine serum albumin (67 kDa) used as standard (lanes 1) and purified gp70 (lanes 2). (A) Periodic acid-Schiff staining showing exoantigen (lane 1) and purified gp70 (lane 2). (B) IEF comparing gp70 and gp43. Lane 1, the pI of gp70 is ∼3.00; lane 2, four isoforms of gp43 are seen; lane 3, pI standards.
