Abstract
Expression of taurine transporter in response to osmotic stress was investigated at the protein level in the mantle of the Mediterranean blue mussel by using the specific antibody raised against the carboxy-terminal region of the deduced amino acid sequence of mussel taurine transporter. Immunohistochemical observation revealed that taurine transporter was expressed in the mantle and the expression was up-regulated in response to hypo-osmotic stress, while down-regulated in response to hyper-osmotic stress. Western blot analysis revealed major protein bands corresponding to 62 kDa and 65 kDa. In response to hypo-osmotic stress, the 62 kDa band became more intense, while it became less intense when the ambient osmolality was elevated. These results suggested that the 62 kDa taurine transporter would be implicated in hypo-osmotic adaptation.
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