SDS-PAGE analysis of protein fractions in the
course of partial purification of ACAD from embryonic axes of
early-germinating sunflower seeds. The different protein fractions were
obtained as described in Methods and in the legend
of Figure 2. Aliquots of the 0% to 40% (lane a, 100 μg of protein)
and 40% to 60% (lane b, 100 μg of protein) ammonium sulfate
fractions, of the pooled fractions from the DEAE-Sepharose step (lanes
c, 100 μg of protein), and of ACAD1 (lanes d, 50 μg of protein) and
ACAD2 (lanes e, 12.5 μg of protein) preparations were separated by
SDS-PAGE. Proteins were visualized by Coomassie blue staining. The
migration of molecular mass markers is given on the right.