Abstract: A motorized aquatic toy having a body with an attached articulated tail formed of pivotally connected hollow tail segments that maintain directional stability when water is flowing through and around them and having forward offset pivot points with mechanical stops that force contiguous tail segments to pivot in sequence from fore to aft in response to yawing of the body to simulate a life-like pattern of movement with a high level of realism.

Abstract: A motorized aquatic toy having a body with an attached articulated tail formed of pivotally connected hollow tail segments that maintain directional stability when water is flowing through and around them and having forward offset pivot points with mechanical stops that force contiguous tail segments to pivot in sequence from fore to aft in response to yawing of the body to simulate a life-like pattern of movement with a high level of realism.

Abstract: The present invention overcomes the problems and disadvantages associated with prior art arrays by providing an array comprising a plurality of biological membrane microspots associated with a surface of a substrate that can be produced, used and stored, not in an aqueous environment, but in an environment exposed to air under ambient or controlled humidities. Preferably, the biological membrane microspots comprise a membrane bound protein. Most preferably, the membrane bound protein is a G-protein coupled receptor, an ion channel, a receptor serine/threonine kinase or a receptor tyrosine kinase.