DLG1 and Parkinson disease: In contrast, in the striatum there were no significant changes in the expression of SAP97 in the caudate nucleus in HD (n = 6) or PD (n = 5), nor in the putamen in HD (n = 6) or PD (n = 5) as compared to control (caudate nucleus n = 5, putamen n = 4; Figure 2(b)).