Journal Article ARA6 Ara6 protein, Arabidopsis Arabidopsis Proteins Chara Chara australis Chara braunii Charales Charophyceae Charopsis EC 3.6.1.- EC 3.6.5.2 Plant Proteins Research Support, Non-U.S. Gov't adaptation aquatic plant diversifying selection endosomal trafficking morphology multivesicular endosome new species oospores organelle DNA plant-specific RAB5 GTPase plasma membrane rab GTP-Binding Proteins rbcL gene scanning electron microscopy speciation taxonomy