Table 4.
The d N/d S ratio of 3 MHC loci in 3 Chinese alligator populations.
| Locus | Position | N | ZJ | AH | USA | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| d N | d S | d N/d S | d N | d S | d N/d S | d N | d S | d N/d S | |||
| I1327 | ABS | 56 | 0.008 ± 0.005 | 0.005 ± 0.006 | 1.60 | 0.008 ± 0.006 | 0.006 ± 0.006 | 1.33 | 0.009 ± 0.006 | 0.006 ± 0.006 | 1.50 |
| non-ABS | 125 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| All | 181 | 0.002 ± 0.002 | 0.002 ± 0.002 | 1.00 | 0.003 ± 0.002 | 0.002 ± 0.002 | 1.50 | 0.003 ± 0.002 | 0.002 ± 0.002 | 1.50 | |
| ABS | 56 | 0.007 ± 0.005 | 0 | ∞ | 0.005 ± 0.004 | 0 | ∞ | 0.003 ± 0.002 | 0 | ∞ | |
| I20 | non-ABS | 125 | 0.002 ± 0.002 | 0.005 ± 0.006 | 0.40 | 0.001 ± 0.001 | 0.004 ± 0.004 | 0.25 | 0.001 ± 0.001 | 0.002 ± 0.002 | 0.50 |
| All | 181 | 0.003 ± 0.002 | 0.004 ± 0.004 | 0.75 | 0.003 ± 0.001 | 0.003 ± 0.003 | 1.00 | 0.001 ± 0.001 | 0.002 ± 0.001 | 0.50 | |
| ABS | 49 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | |
| Beta1085 | non-ABS | 139 | 0 | 0.001 ± 0.001 | 0.00 | 0.002 ± 0.002 | 0.005 ± 0.004 | 0.40 | — | — | — |
| All | 188 | 0 | 0.001 ± 0.001 | 0.00 | 0.001 ± 0.001 | 0.004 ± 0.003 | 0.25 | — | — | — | |
Note: the d N/d S ratios are calculated separately for antigen-binding site (ABS), non-ABS and all sites. Codon numbers (N) of the sites are shown. In the USA population, Beta1085 locus has only one allele, thus no d N and d S values are calculated.