pt. 1. Connexin -- pt. 2. Development and gap junctions -- pt. 3. Gastric mucosa and gap junctions -- pt. 4. Carcinogenesis and gap junctions -- pt. 5. Cardiac muscles and gap junctions -- pt. 6. Nervous system and gap junctions -- pt. 7. Gland function and gap junctions -- pt. 8. Assembly of gap junctions -- pt. 9. Expression and regulation of gap junctions -- pt. 10. Gap junctions expressed in oocytes -- pt. 11. Gating and conductance change of gap junctions.