Abstract

The cDNAs encoding the porcine luteinizing hormone (LH) β subunit (pLHβ) were isolated from a cDNA library of porcine anterior pituitary constructed in an expression vector λgt11 using anti-pituitary glycoprotein hormone antisera. The nucleotide sequence of pLHβ subunit cDNA clone (543 bases) was determined. The cDNA encodes a signal sequence (20 amino acids) and a further 121 amino acids corresponding to the mature LHβ molecule. The predicted protein sequence differs from that determined by direct peptide sequencing at 6 residues and additionally shows an extended carboxyl terminus. The 5′ untranslated sequence shows a low homology and is extremely long when compared with other mammalian LHβ subunit cDNAs. Northern analysis showed that the length of the pLHβ subunit mRNA is about 0.85 kb.

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