Scheme of LigA and LigB proteins from L. interrogans serovar Copenhageni adapted from Silva et al. . The squares represent the immunoblobulin-like repeat domains found in the proteins of Leptospira. The C-terminal portion of the LigB protein is represented by the final rectangle. LigA (1224 amino acids and 128 kDa) and LigB (1891 amino acids and 201 kDa) present a region with seven repeated identical domains named LigB (131-645aa) (corresponding to amino acids 131 to 645 of LigA and LigB with 54 kDa, indicated by grey squares).