Extracts from asynchronous cultures of strains Sir4-Myc Tom1-HA (GA-10645), Sir4-RKR-Myc Tom1-HA (GA-10646), Tom1-HA (GA-10647) and Sir4-Myc (GA-10199) were subjected to anti-Myc IP and western blotting with indicated antibodies in the presence and absence of lambda phosphatase. 