Thomas Cavalier-Smith ha proposto anche un sesto regno (Chromista), comprendente le classi dei Hyphochytridiomycetes e Oomycetes. ###>They have a characteristic range of soluble carbohydrates and storage compounds, including sugar alcohols (e.g., mannitol), disaccharides, (e.g., trehalose), and polysaccharides (e.g., glycogen, which is also found in animals).