The present invention relates to a switching circuit and a method of controlling a threshold voltage of a semiconductor switching element of the switching circuit, wherein a bulk voltage of the semiconductor switching element is selected in response to a control signal derived from an output signal of the semiconductor switching element. These polypeptides are useful for activating T cell responses. These UZM-8HS are represented by the empirical formula: M1an+AlExSiy\u2032Oz\u2033and are prepared by treatments such as acid extraction and AFS treatments. A method of identifying compounds that inhibit the binding of mosquito arrestin to a mosquito odorant receptor is also disclosed. Methods of using said reagents and diagnostic kits are also provided. The protrusion is configured to be received in the mating blind-mate connector.