Expressions such as “” means the sum of the molar ratios of Xaa1 and Xaa2, etc. Xaa1 and Xaa2 are, independently, residues having hydrophobic sidechains {HEAD ~ Exemplary} naturally occurring {TAIL ~ amino acid residues} include Ala, Gly, Ile, Leu, Met, Phe, Pro, Trp, Tyr, and Val 
naturally occurring
Expressions such as “ ” means the sum of the molar ratios of Xaa1 and Xaa2 , etc . Xaa1 and Xaa2 are , independently , residues having hydrophobic sidechains { HEAD ~ Exemplary } naturally occurring { TAIL ~ amino acid residues } include Ala , Gly , Ile , Leu , Met , Phe , Pro , Trp , Tyr , and Val
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH