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Protein abundance of Nkaα in the gills of Himantura signifer. Protein abundance of Nkaα in the gills of H. signifer kept in fresh water (FW; control), or after 6 d of exposure to salinity 20 (S20). (A) Immunoblot of Nka α. (B) The intensity of the Nka α protein band per mg protein. Results represent means ± s.e.m. (N = 4). *Significantly different from the FW control (P < 0.05).
