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. 2012 Mar 6;7(3):e32801. doi: 10.1371/journal.pone.0032801

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Families were identified based on amino acid alignments and variability in the complementarity determining regions (CDRs) bracketed in red boxes. Single representatives of each family are shown here. Clones d3x, d9x, G1, H4, and C8x are members of families that are not described in this study.