Figure 2

Alignment of Oosp protein sequence with the N-terminal part of the ZP domain (150 amino acids) of ZP3. Identities and similarities are shown with black boxes and black frames, respectively. An hypothetical disulfide bond is suspected between Cys78 and Cys98 according to experimental data obtained on the corresponding Cys61 and Cys81 of ZP3 [11].