Porcine luteinizing hormone. The amino acid sequence of the α subunit

IntroductionLuteinizing hormone fl subunits from ovine (0-LH 0) and bovine (B-LH /3) origins were shown to be completely homologous [ 1,2] .We recently reported [3] that porcine luteinizing hormone /3 subunit (P-LH /3) exhibits 15 amino acid replacements when compared to B-LH /I and 0-LH 3.In order to see whether such a difference does also exist between amino acid sequences of porcine and ovine LH (Y subunits [4,5], we present here the primary structure of P-LH (Y and compare it to 0-LH c!. peptides, eluted in the first peak, were further purified by chromatography on QAE-Sephadex A-25 (Pharmacia).as previously described [2].Peptides from the other peaks were separated by preparative high voltage electrophoresis and paper chromatography