A deep-sea hydrothermal vent worm detoxifies arsenic and sulfur by intracellular biomineralization of orpiment (As2S3)
Fig 4
SEM and TEM analysis of the yellow granules.
A: A SEM image of P. hessleri branchial apparatus; A’: A magnified region showing the electron-dense intracellular yellow granule. B: A SEM image of P. hessleri body wall; B’: A magnified region showing the electron-dense intracellular yellow granules. C: A SEM image of the digestive tract yellow granules. D: A TEM image of P. hessleri branchial apparatus. E: A close-up image of a typical branchial apparatus yellow granule. F: A TEM image of P. hessleri body wall; F’: A magnified region showing yellow granules and a secretion cell. G: A TEM image of buccal tentacles yellow granules; H: A TEM image of digestive tract yellow granules. ci: cilia; cu: cuticle, mt: mitochondria; gry: yellow granule, nu: cell nuclei.