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Phylogenetic tree of gC1q domains of proteins that have both collagen-like and gC1q domains. The tree was constructed by the neighbor-joining method, based on the alignment of amino acid sequences from 50 proteins by using clustalw software. Numbers on branches are bootstrap percentages supporting a given partitioning. C1q, adiponectin, type VIII collagen, type X collagen, and chipmunk hibernation-associated plasma protein are grouped as indicated, but other proteins are not defined.
