Insulin and other polypeptides are highly important compounds in the body, functioning as neurotransmitters, hormones, and antibacterials, among other uses. These compounds are often underutilized as pharmaceuticals however, due to their difficulty in administration, namely they often must be injected instead of being orally available. Why might they be difficult/impossible to administer as an orally available drug? 5) In the protein adenylate kinase, one end of the protein has the sequence below. Val-Asp-Asp-Val-Phe-Ser-Gln-Val-Cys-Thr-His-Leu-Asp-Thr-Leu-Lys The hydrophobic residues are in bold-why might they be found with the spacing that they are?