Figure 4-78 Shows a Fatty-Acid-Binding Protein from Two Different Angles

Figure 4-78 shows a fatty-acid-binding protein from two different angles.Apart from its two short α helices, its structural elements are extended strands that form a curved β sheet, which is called a β barrel.
A.Draw arrows on the six top strands in panel (A) (those running horizontally) to determine whether the β barrel is made up of parallel or antiparallel strands.
B.Look at panel (B) and predict the relative distribution of polar and nonpolar side chains (inside the barrel or outside the barrel) and explain your answer.
Figure 4-78