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Artificial recombinant fragments were amplified from a mixed-NDV sample. LaSotaM and ZJ1M represent M gene sequences of Lasota and ZJ1. LaSota sequences and ZJ1 sequences are indicated by green and red bars, respectively. LaSota and ZJ1 genome sequences were identified in one clone (L1000Z1M-4). The fragment between the green and red arrows denotes a potential template switching position.
