Figure 10.

Alignment of Partial Genomic DNA Sequences and Deduced Amino Acid Sequences of the S₄- and S₄′-Haplotype–Specific SFB Genes.

Nucleotide (nt) and predicted amino acid (aa) sequences representing P. avium SFB sequences for S₄ and S₄′. Putative intron sequence within the 5′ untranslated region is presented in lower case and indicated by asterisks. Twelve amino acids are missing at the 3′ end of the S₄ sequence. Residues highlighted in gray denote divergence from the original S₄-SFB sequence. The F-box region and the two variable regions Va and Vb as identified by Ushijima et al. (2003) are boxed. A 4-bp deletion in the S₄′-SFB sequence at position 742 to 745 in the first variable region leads to the deletion of a single Tyr residue (#) and a subsequent frame shift in translation. Premature stop codons present in the S₄′-SFB sequence are highlighted in black.