Dev Biol. 2019 Jun 1;450(1):9-22. doi:10.1016/j.ydbio.2019.03.006

Mikhaleva Y, Tolstenkov O, Glover JC.

Gap junction-dependent coordination of intercellular calcium signalling in the developing appendicularian tunicate Oikopleura dioica.

Calcium waves observed with GCaMP6. Each wave is preceded by a “minipeak”. Two connexins (CxA and CxB) are expressed during embyogenesis. ”Knockdown of both CxA and CxB mRNA severely disrupts Ca2+ wave propagation and thereby also synchronization.“