Multiple internalized structures labeled with Cx43 antibody. Serial sections of ovarian granulosa cells were labeled with anti-Cx43 and 10nm gold. Part one shows 18 serial sections through several connexosomes, identified by Cx43 labeling. Part two shows 14 serial sections through a different granulosa cell showing other types of vesicles labeled with Cx43 (yellow arrows). Scale bars are 250nm.