VERTEBRAL PNEUMATICITY IN THE ORNITHOMIMOSAUR ARCHAEORNITHOMIMUS (DINOSAURIA: THEROPODA) REVEALED BY COMPUTED TOMOGRAPHY IMAGING AND REAPPRAISAL OF AXIAL PNEUMATICITY IN ORNITHOMIMOSAURIA.

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Polycomb Group (PcG) Fruits/Veggies proteins are best-known for maintaining repressive or active chromatin states that are passed on across multiple cell divisions, and thus sustain long-term memory of gene expression.PcG proteins engage different, partly gene- and/or stage-specific, mechanisms to mediate spatiotemporal gene expression during centr