To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 4 Actin movement in the podosome cluster. The actin clouds spontaneously moved in the podosome cluster. RAW 264.7 cells transfected with EGFP-actin. EGFP fluorescence was acquired every 4 sec by an Olympus FV10i. Corresponds to Figure 1D. Symmetrical retrograde actin flow in the actin fusion structure is involved in osteoclast fusion Jiro Takito, Hirotada Otsuka, Satoshi Inoue, Tsubasa Kawashima, and Masanori Nakamura Biology Open 2017. 6:1104-1114; doi: 10.1242/bio.025460 Download Original Video