Abstract: The present invention is method of determining whether or not associations between a given protein and other proteins in a cell are specific.

Abstract: A lighting fixture swivel joint for pivoting an upper conduit having a fixture head disposed at an upper end thereof downward with respect to a lower conduit generally includes an upper swivel joint member and a lower swivel joint member rotatably coupled to the upper swivel joint member about a plane of rotation. The upper swivel joint member includes an upper conduit receptacle defined by a longitudinal axis and being adapted to receive a lower end of the upper conduit, whereby the upper conduit is coaxially aligned with the longitudinal axis. The plane of rotation is disposed at an angle of between zero degrees (0°) and thirty degrees (30°) with respect to the longitudinal axis of the upper conduit receptacle of the upper swivel joint member.