[(1->2)-alpha-L-rhamnosyl-(1->4)-alpha-D-galacturonosyl]n polyanion
[(1->2)-alpha-l-rhamnosyl-(1->4)-alpha-d-galacturonosyl]n polyanion
A polyanionic polymer obtained by deprotonation of the carboxy groups of [(1→2)-α-<small>L</small>-rhamnosyl-(1→4)-α-<small>D</small>-galacturonosyl]<small><sub><em>n</em></sub></small>; major species at pH 7.3.