which was equilibrated with methanol/water (3:2, v/v) prior to sample
loading. The crude TSE (200 mg) was loaded onto the
column, and metTSE was eluted with 5 column volumes of
methanol/water (3:2, v/v) at a flow rate of 1.2 mL/min.
The eluate was evaporated to dryness to give a powder
(metTSE, 49.8 mg). Polymeric PA was eluted with
acetone/water (3:2, v/v). The aqueous acetone fraction was
concentrated under reduced pressure at 60оC to remove
acetone, and then lyophilized to give a powder (acTSE,
148.2 mg). The polymeric PA from crude GSE was
purified with SephadexLH20 in the same manner. The
crude GSE (200 mg) gave acGSE (73.6 mg) and metGSE
(123.7 mg). The acTSE and acGSE were used as standards
for the determination of polymeric PA by HPLC/UV.