I) Solubility analysis of the in vitro solubility screen performed by Niwa et al (Niwa et al, 2009). Left panel shows combined box- and violin plots depicting the solubility distributions of proteins containing at least one strong APR (TANGO score > 70) not protected by any negative GKs (red) versus proteins where all strong APRs are flanked by at least one negative charge (blue). The right panel shows a control analysis, in which proteins were classified by the occurrence of at least one strong APR (TANGO score > 70) not flanked by any positive GKs (red) versus proteins where all strong APRs are flanked by at least one positive charge (blue). The upper boxplot whiskers indicate the largest value no further than 1.5 times the Inter-Quartile Range (IQR) from the upper hinge, the lower whiskers show the smallest value at least 1.5 * IQR from the lower hinge. Notches extend 1.58 * IQR / sqrt(n) from either side of the median and represent a 95% confidence interval for the median value. Statistical significance was determined through Kruskal-Wallis test with a post-hoc Wilcoxon analysis for pairwise testing. P-values are indicated. 