FIG. 2.

(A) Distribution of BLASTX results among four categories of significance. 1, strong similarity with S. meliloti proteins (E ≤ 1e⁻⁶; identity, ≥85%); 2, strong similarity with sequences available in the databases (E ≤ 1e⁻⁶); 3, local or weaker similarity with sequences available in the databases (1e⁻² ≤ E ≤ 1e⁻⁶); 4, no similarity with sequences available in the databases. (B) Classification of the most significant matches (E ≤ 1e⁻⁶) using Riley's classification (34, 35).