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In a dividing cell (above), tiny organs referred to as peroxisomes (inexperienced) are evenly distributed in distinctive arcs. In cells missing the protein Pex11b, peroxisomes are not allotted equally. Credit score: Laboratory of Mammalian Cell Biology and Growth at The Rockefeller College/Science When most cells divide, they merely make extra of themselves. However stem cells, that are liable for repairing or making new tissue, have a selection: They'll generate extra stem cells or differentiate into pores and skin cells, liver cells, or nearly any of the physique's specialised cell sorts. As reported February three in  Science , scientists at The Rockefeller College have found that this pivotal determination can hinge on whether or not or not tiny organ-like buildings, organelles, are divvied up correctly throughout the dividing stem cell. "To ensure that the physique's tissue...