Cells of the cyanobacterium Neosynechococcus sphagnicola with intracellular amorphous calcium carbonates (green) and polyphosphates (red) and the 3D structure model of CoBaHMA, a protein domain involved in carbonate biomineralization. Image credits: @CNRS Karim Benzerara and Isabelle Callebaut. For more information see Benzerara et al. “A new gene family diagnostic for intracellular biomineralization of amorphous Ca-carbonates by cyanobacteria” https://doi.org/10.1093/gbe/evac026