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Phylogenic analysis of ASL1 protein. (A) Amino acid sequence alignment of the four kinds of RPS20 proteins. Amino acids fully or semiconserved are shaded black and gray, respectively. (B) Homologous proteins similar to ASL1 were used to obtain a phylogenetic tree with the program Mega5.1, which was bootstrapped over 1000 cycles. Significance values greater than a 50% cutoff threshold are indicated near the relative branches.
