Table 1.

Crossreactivity (%) with POMC Fragments for Beta-Endorphin Directed Antisera for POMC-Peptide Assays

Peptide	C-terminal / βLP assaya	N-terminal assaya	Specific βE1-31 assayb
	BEC-IR	BEN-IR	BET-IR
βE1-31	100	100	100
β-Lipotropin1-91	102	<1.0	16 @ 500 pg/ml
βE6-31	84	2	N/A
βE1-27	75	43	0.007 @ 5mg/ml
βE1-17	N/A	N/A	0.007 @ 5mg/ml
βE1-16	<0.01	69	0.005 @ 5mg/ml
Leu-enkephalin	<0.01	<0.04	<0.001 @ 5mg/ml
Met-enkephalin	<0.01	9	<0.001 @ 5mg/ml

^aDirectional insert; Euro-Diagnostica AB, Malmo, Sweden

^bDirectional insert; Nichols Institute Diagnostics, San Juan Capistrano, CA

N/A not available