Fig. 2

Sliding window plot of nucleotide diversity and amino acid polymorphism of SURFIN_4.1 extracellular region in the western Kenyan Plasmodium falciparum population. Window length of 90 bp and step size of 3 bp is used for the sliding window plot (top). The number of the amino acid type at each amino acid position (middle) and a scheme of SURFIN_4.1 extracellular region (bottom) are shown in scale to visualize the location of the polymorphic sites. SURFIN_4.1 extracellular region was divided into 4 parts: N-terminal (N), Cys-rich domain (CRD), and variable regions 1 and 2 (Var1 and Var2). A total of 24 sequences from western Kenya isolates were used. Nucleotide and amino acid positions are after 3D7 line sequences