Complex sentence: Bb remains part of the C3 (H 2 O) to form C3 (H 2 O) Bb, this complex is also known as a fluid-phase C3 convertase.
Split into simpler sentences: Bb remains part of the C3 (H 2 O) to form C3 (H 2 O) Bb. This complex is also known as a fluid-phase C3 convertase.