A plurality of radially arcuate slip segments supported in a bowl are interlocked together by tongues which extend radially from the axially extending sides of the segments and mate with slots in the axially extending sides of adjacent segments to prevent axial displacement of the slip segments with respect to each other. The strip includes an elongate plastic strip having a flat base portion and a plurality of laterally spaced apart lengthwise extending rib portions upstanding from the base portion; and a plurality of elongate reinforcing members extending lengthwise within respective rib portions, the rib portions and the reinforcing members forming composite ribs. The invention still further provides isolated 27877, 18080, 14081, 32140, 50352, 16658, 14223, 16002, 50566, 65552 or 65577 proteins, fusion proteins, antigenic peptides and anti-27877, 18080, 14081, 32140, 50352, 16658, 14223, 16002, 50566, 65552 or 65577 antibodies.