cDNA and derived amino acid sequences of the S. schenckii sssit gene. Figure 4A shows the sequencing strategy used for sssit gene. The size and location in the gene of the various fragments obtained from PCR and RACE are shown. Figure 4B shows the cDNA and derived amino acid sequence of the sssit gene. Non-coding regions are given in lower case letters, coding regions and amino acids are given in upper case letters. The original sequence isolated using the yeast two-hybrid assay is shadowed in gray.