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We summarize several projects carried out by the CTEQ global analysis ofparton distribution functions (PDFs) of the proton during 2010. We discuss arecently released CT10 family of PDFs with a fixed and variable QCD couplingstrength; implementation of combined HERA and Tevatron lepton asymmetry datasets; theoretical issues associated with the analysis of $W$ charge asymmetryin PDF fits; PDFs for leading-order shower programs; and constraints on newcolor-octet fermions from the hadronic data.

CT10 parton distributions and other developments in the global QCD analysis