the tropical brown alga lobophora variegata: a source of antiprotozoal compounds. | lobophora variegata, a brown alga collected from the coast of the yucatan peninsula, mexico, was studied for antiprotozoal activity against giardia intestinalis, entamoeba histolytica and trichomonas vaginalis. the whole extract showed the highest activity against t. vaginalis, with an ic(50) value of 3.2 microg/ml. for the fractions, the best antiprotozoal activity was found in non-polar fractions. the chloroform fraction of the extract contained a major sulfoquinovosyldiacylglycerol (sqdg), id ... | 2010 | 20479979 |