To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 The cytoplasmic domain of the gamete membrane fusion protein HAP2 targets the protein to the fusion site in Chlamydomonas and regulates the fusion reaction Y. Liu, J. Pei, N. Grishin, and W. J. Snell Development 2015. 142:962-971; doi: 10.1242/dev.118844 Download Original Video