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Schematic representation of the PPE55 (Rv3347c) protein of M. tuberculosis H37Rv. The dotted areas show hydrophobic regions. The striped areas indicate the positions of the repetitive clusters (RC1 to RC5). The black bars denote the portions of the PPE55 protein expressed in λgt11 clones 1 and 2 and in the PPE-C protein. The positions of the peptides are indicated by black lines. The arrow indicates the signal peptidase cleavage site. The conserved N-terminal 180-aa region is marked.
