title: Electrophoresis of opioid peptides on columns with agarose suspension.
abstract: Opioid peptides have been fractionated by column electrophoresis in agarose suspension. The procedure provides a high resolution efficiency and compares favorably with high-performance liquid chromatography. Peptides were recovered from the column in 70% or higher yields when run in the femtomole to the nanomole range. By choosing different pHs it is possible to get complete resolution of a number of different endorphins. The electrophoreses were performed in volatile buffers, which are easily evaporated, and the residues are suitable for direct screening by radioreceptor- or radioimmunoassays. In combination with these assays the separation procedure makes it possible to detect and identify very low concentrations of endorphins in samples of biological origin.
mesh_terms: D004587:Electrophoresis, Agar Gel / Q000379:methods; D004723:Endorphins / Q000302:isolation & purification*; D004745:Enkephalins / Q000302:isolation & purification; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010902:Pituitary Gland / Q000032:analysis; D011863:Radioimmunoassay; D011869:Radioligand Assay
chemical_list: D004723:Endorphins; D004745:Enkephalins