Presence of EP3 chitinases in media of
nonembryogenic, embryogenic, and density-fractionated embryogenic
cultures. A, Detection of EP3 isoenzymes in the medium of several
different suspension cultures. Lanes 1 and 2, Nonembryogenic suspension
cultures; and lanes 3 to 6, embryogenic suspension cultures. B,
Detection of EP3 isoenzymes in the medium of a Percoll-fractionated
suspension culture: lane 1, cells < 50 μm; lane 2, 0 to 10%
Percoll; lane 3, 10 to 20% Percoll; lane 4, 20 to 30% Percoll; lane
5, 30 to 40% Percoll; and lane 6, cells > 125 μm. The proteins
were separated by nondenaturing PAGE and detected by immunoblotting.