FIG. 1.

Nucleotide sequence of cspA1/cspA2 from Y. enterocolitica. cspA1 (upper protein sequence) and cspA2 (lower protein sequence) differ only in the 13th and 15th amino acids and in the third amino acid of the C terminus. Putative transcriptional start site (+1), putative promoter regions (−10, −35), and the cold-box are indicated. Sequence in boldface type shows the position of the A1 probe (YeA1-Dig). The underlined sequence indicated by upper facing arrows shows the putative transcriptional termination structure of the monocistronic mRNA. The underlined sequence indicated by lower facing arrows shows the transcriptional termination structure of the polycistronic mRNA. The sequence underlined by a wavy line in cspA1 can fold in an antiparallel direction to the same region of cspA2, forming an extensive secondary structure. EcoRV restriction sites, which cut at positions +73, +579, and +909, are indicated by italics.