8014 hypothetical proteinThalassiosira pseudonana
GO:0005509 GO:0005576 -
calcium ion binding
Interacting selectively and non-covalently with calcium ions (Ca2+).
The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.