Different hexagonal crystal morphologies of apoA-IV64–335. Morphologies are arranged from left to right based on increasing nucleation time and are a product of slight variations in the crystallization solution. The shortest nucleation time creates a long crystal, termed a needle. As the nucleation time increases from 1 to 10 d, other hexagonal morphologies arise. The vertical direction of the scheme indicates the position of the long axis (c axis) relative to the crystal morphology.