Result: Residue P291T were present in 6 NPC samples and the residue R413G was detected only in TW392.

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Result: The residue P291T mutation existed in 6 NPC samples (Figure 1).

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Result: This type had six non-silent mutations (P291T, R413G, I438L, E476G, P484H and I486T) and four silent mutations (383cct-cca, 408gcc-gca, 417acg-aca and 470tca-tct) in addition to the three common mutations (Figure 1).

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