Average Rb1 gene expression in AL and patients with MM was correlated with their del 13q status. AL0 and MM0 are the groups without the deletion 13q, while AL1 and MM1 are the groups that are positive for del 13q. The average gene expression was higher in patients without the del 13q, both in AL and MM, compared to patients with the del 13q, indicating a positive correlation between Rb1 expression and chromosome 13 status.