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