The results presented in Figure 3 indicted that there are some common features in patterns of expression of behavior-related genes in MPS, namely, expression of eight such genes (OXTR, ITGA3, HRH1, EIF4A3, ID2, HOMER2, B2M, and INSR) was significantly changed in six or more MPS types/subtypes. This evidence concerns the gene B2M and mucopolysaccharidosis.