Table 1. The general structure of designed peptide-like ligands. Fragments of parent peptides that are appropriate for a given series of compounds are underlined.

N-Terminus	Compound	AA2–AA3 fragment (series I)	Compound	AA2–AA3 fragment (series II)	Compound	AA2–AA3 fragment (series III)	C-Terminus
H2N-Lys(hArg)-	2	P[combining low line]r[combining low line]o[combining low line]–P[combining low line]r[combining low line]o[combining low line]	3	Dab–P[combining low line]r[combining low line]o[combining low line]	4	P[combining low line]r[combining low line]o[combining low line]–Ala	–Arg–OH
	5	Hyp–Hyp	11	Dab–Hyp	17	Hyp–Ala
	6	Aze–Aze	12	Dab–Aze	18	Aze–Ala
	7	ΔPro–ΔPro	13	Dab–ΔPro	19	ΔPro–Ala
	8	Oic–Oic	14	Dab–Oic	20	Oic–Ala
	9	Piz–Piz	15	Dab–Piz	21	Piz–Ala
	10	Tic–Tic	16	Dab–Tic	22	Tic–Ala