Figure 6. IBMX and dbcAMP treatment decreased myosin II activity in mouse oocytes.
(A) Immunostaining of control (CTRL) oocytes cultured in control medium for 10 hours and oocytes cultured in M16 medium for 10 hours after a 20 hour incubation with 0.3 mM dbcAMP or 0.2 mM IBMX. Oocytes were stained with anti-phospho-MLC2 (Ser19) antibody (myosin II, green) and Hoechst 33342 (DNA, blue). (B) The myosin II activities of control or treated oocytes were assayed. Extracts from control, dbcAMP-treated and IBMX-treated oocytes were immunoblotted with antibodies against phospho-MLC2 or β actin. Each lane represents a protein sample derived from 300 oocytes.