This protein accumulation forms proteinaceous cytoplasmic inclusions called Lewy bodies. Efflux pumps are proteinaceous transporters localized in the cytoplasmic membrane of all kinds of cells. Many "Halobacterium" species possess proteinaceous organelles called gas vesicles. The word "prion" derives from "proteinaceous infectious particle". Proteins have less imbibition capacity, thus proteinaceous pea seeds swell more than starchy wheat seeds. Arylsulfatase A is activated by saposin B (Sap B), a non-enzymatic proteinaceous cofactor. During reproduction, the clitellum secretes a yolk (albumen) and a proteinaceous sheath which hardens. These glands deliver a proteinaceous secretion via ducts onto the surface of the mucosa. Their secretions are a non-sticky, proteinaceous compound to maintain the airway in the smallest bronchioles. The endosperm is surrounded by the aleurone layer (peripheral endosperm), filled with proteinaceous aleurone grains. Pellicle is an acellular proteinaceous film which covers the teeth. The dead tissue appears as a soft and white proteinaceous dead cell mass. They have outer cells produced in the larval stages that are reinforced with proteinaceous cement. The proteinaceous composition accounts for the slime's high tensile strength and stretchiness. Another possible alternative is a yeast-based coproduct of bioethanol production, proteinaceous fermentation biomass.