Complex sentence: CaBP4 has been theorized to modulate the activity of the Ca v 1.4 channel, and furthermore, it has been theorized to be associated with the proper establishment and maintenance of photoreceptor ribbon synapses.
Split into simpler sentences: CaBP4 has been theorized to modulate the activity of the Ca v 1.4 channel. It has been theorized to be associated with the proper establishment and maintenance of photoreceptor ribbon synapses.