Van Snick has a murine B cell hybridomak 7TD1, that can be
used in an assay for murine IL-6. Since human IL-6 is
active in mice, this hybridoma would probably be useful in a
bioassay for human IL-6. See Van Snick et al., Proc. Natl.
Acad. Sci. 83:9679 (1986).
Jack Komisar