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Table 4 NS1 sequence characteristics and positive selection analysis results

From: Performance of commercial dengue NS1 ELISA and molecular analysis of NS1 gene of dengue viruses obtained during surveillance in Indonesia

DENV serotype DNA polymorphic site Protein polymorphic site pi (−) pi (N) pi (+)
DENV-1 (n = 21) 190 30 93.6% 2.6% 3.7%
DENV-2 (n = 6) 58 7 NA NA NA
DENV-3 (n = 17) 119 22 96.8% 1.7% 1.4%
DENV-4 (n = 4) 38 5 NA NA NA
  1. Note:
  2. pi (−): proportion of sites undergoing strong constraining selection.
  3. pi (N): proportion of sites undergoing neutral selection.
  4. pi (+): proportion of sites undergoing strong positive selection.
  5. NA: not applicable due to inadequate sample size.