Figure 1. Proteins that are differentially expressed between children with and without strabismus. Abscissa is m/z (Da), the axis is the relative area of the protein peak (S/N). a. monozygotic twins with strabismus; b and c, non-twins with strabismus; d, twins without strabismus; e and f, two healthy children as controls. Levels of 4,146 Da protein (A) and 4,801 Da protein (B) were lower in children with strabismus (a, b, and c), as compared to non-strabismus children (d, e, and f); Protein 5,859 Da (C) was highly expressed in strabismus children (a, b, and c), as compared to non-strabismus children (d, e, and f). Protein 7,786 Da (D) was expressed at lower levels in twins (a and d) and strabismus children (b and c), as compared to healthy controls (e and f).