Complex sentence: They are referred to as coiled coils unless they are proven to be important for protein function, if that is the case then they are annotated in the "domain" subsection, which would be the bZIP domain.
Split into simpler sentences: They are referred to as coiled coils unless they are proven to be important for protein function. If that is the case, then they are annotated in the "domain" subsection, which would be the bZIP domain.