Table 3. Reactions of monoclonal anti-keratin antibodies 68.4,
Pan 1 ± 8, K8.13, K8.60, 46.6, and 69.16 with tissues of the shark
Scyliorhinus stellaris as deduced from immunofluorescence microscopy
on frozen sections. Monoclonal antibody 69.16 that in
Xenopus laevis is specific for mitochondrial antigens was included
because in immunoblots of shark cytoskeletal preparations this
antibody, likewise antibody 46.6, exclusively labeled SstK8.