Scientists use protein, RNA to make hollow, spherical sacks called vesicles

Using protein and RNA, scientists have created hollow, spherical sacks known as vesicles. These bubble-like entities -- which form spontaneously when specific protein and RNA molecules are mixed in an aqueous buffer solution -- hold potential as biological storage compartments. They could serve as an alternative to traditional vesicles that are made from water-insoluble organic compounds called lipids, researchers say.