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Table 3 Synonymous and non-synonymous substitutions in the 6 DQA alleles of the giant panda. Distances were calculated separately for ABS and non-ABS and the distribution of gene frequency was taken into account. Standard errors were computed using 1000 bootstrap replicates. N is the number of codons in each category and P is the probability that d N and d S are different.

From: Low major histocompatibility complex class II DQA diversity in the Giant Panda (Ailuropoda melanoleuca)

Population Positions N d N d S d N /d S P
Ya'an-Wolong ABS 21 0.022 ± 0.013 0.000 ± 0.000 0.047
  Non-ABS 70 0.014 ± 0.007 0.011 ± 0.011 1.273 0.441
  All 91 0.016 ± 0.006 0.010 ± 0.010 1.600 0.259
Chengdu ABS 21 0.055 ± 0.030 0.000 ± 0.000 0.033
  Non-ABS 70 0.018 ± 0.008 0.009 ± 0.009 2.000 0.169
  All 91 0.027 ± 0.010 0.007 ± 0.007 3.857 0.037
Louguantai ABS 21 0.044 ± 0.021 0.000 ± 0.000 0.022
  Non-ABS 70 0.017 ± 0.007 0.011 ± 0.011 1.545 0.292
  All 91 0.024 ± 0.008 0.009 ± 0.009 2.667 0.063
All ABS 21 0.047 ± 0.023 0.000 ± 0.000 0.020
  Non-ABS 70 0.016 ± 0.007 0.010 ± 0.010 1.600 0.214
  All 91 0.024 ± 0.008 0.008 ± 0.008 3.000 0.046