FIG. 2.

Variants of P.69 observed in the Dutch B. pertussis population. Depicted are the DNA sequence and corresponding amino acid sequence of the single polymorphic region observed. In P.69C and P.69A, only differences with respect to P.69B are indicated. Dots and dashes indicate identical bases and gaps, respectively. GGxxP repeats are underlined. The RGD sequence, which is involved in attachment to mammalian cells, is indicated by double underlining. The number 778 refers to the position of the first base of the indicated sequence in the prn gene.