Collagen VI suprastructure analysis.

<p>A, Collagen VI suprastructures were isolated from human articular cartilage extracts using superparamagnetic immunobeads coupled to collagen VI antibodies. The isolated suprastructures were then doubly immuno-labeled with sheep anti-WARP antiserum (18-nm gold particles; black arrowheads) and rabbit anti-collagen VI antibody (small gold particles; white arrowheads). WARP is present in collagen VI suprastructures. Scale bar is 100 nm.