An edge card electrical connector is used for receiving the edge of a printed circuit board having contact pads on one or both sides adjacent to the so described edge. The outer race has a first bore with an internal groove. Also included in the present invention are therapeutic compositions comprising such proteins, nucleic acid molecules, antibodies andor inhibitory compounds as well as the use of such therapeutic compositions to mediate Fc epsilon receptor-mediated biological responses. The molecular weight of surfactant of the formula divided by m is 430 or greater.