In contrast, only Rab1A, and not Rab1B, has been associated with neurological disorders, for example, Parkinson’s disease (Winslow et al, 2010; Coune et al, 2011; Ejlerskov et al, 2013; Mazzulli et al, 2016; Hatstat et al, 2022), Alzheimer’s disease (Mohamed et al, 2017), amyotrophic lateral sclerosis (Webster et al, 2018), and intellectual disability (Tabata et al, 2022). Here, RAB1B is linked to Intellectual disability.