FIG. 5.

Gel electrophoretic analysis of polypeptides in R. rhodochrous cell extracts and comparison to the partially purified R. rhodochrous and purified Xanthobacter strain Py2 acetone carboxylases. Lanes 1 and 8, molecular mass standards (1 μg per standard); lane 2, glucose-grown R. rhodochrous cell extracts (30 μg); lane 3, propylene-grown R. rhodochrous cell extracts (30 μg); lane 4, isopropanol-grown R. rhodochrous cell extracts (30 μg); lane 5, acetone-grown R. rhodochrous cell extracts (30 μg); lane 6, partially purified R. rhodochrous acetone carboxylase (5 μg); lane 7, purified Xanthobacter strain Py2 acetone carboxylase (2 μg).