Fig. 2.

Network analysis for OAS1 _r2. Each node represents a different haplotype, with the size of the circle proportional to frequency. Nucleotide differences between haplotypes are indicated on the branches of the network. The position of rs11352835 (A insertion/deletion in the alternative exon 7) is shown. Circles are colour-coded according to population (green YRI, blue CEU, red EAS). The most recent common ancestor (MRCA) is also shown (black circle). The relative position of mutations along a branch is arbitrary