1.7.2.8 anammoxosome - 44222 -, 742269 1.7.2.8 anammoxosome the enzyme is present only inside a cytoplasmic membrane-bounded region, which makes up about 30–60% of the cell volume. The anammoxosome is completely surrounded by a compartment containing the nucleoide and ribosomes, and so resembles structurally the pirellulosome in other planctomycetes 44222 697514 1.7.2.8 anammoxosome the organelle is surrounded by ladderane lipids and exclusively contains the hydrazine oxidoreductase as the major protein to combine nitrite and ammonia in a one-to-one fashion 44222 696141 1.7.2.8 extracellular - - 724029