Compositional properties of coding region of all NDV genomes Both (C + G)% and (C + G) 3 % have a highly significant correlation with each of A%, U%, C%, G%, A 3 %, C 3 %, G 3 %, and U 3 %, respectively, indicating that (C + G)% and (C + G) 3 % may reflect some important characteristics of codon usage pattern of NDV (Table 5 ).
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