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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Parallel bioassay of litorin and phyllolitorins on smooth muscle preparations.

Phyllolitorin and Leu8-phyllolitorin, two nonapeptide amides from the skin of the South American frog Phyllomedusa sauvagei, are representatives of a novel bombesin subfamily, characterized by the occurrence in their molecule of a serine residue substituting the usual histidine residue at position 3 from the C-terminus. In parallel bioassay on ten different smooth muscle preparations and rat blood pressure, phyllolitorin and Leu8-phyllolitorin were virtually equiactive, but the two peptides appeared remarkably less potent that litorin in all test preparations, except the rat urinary bladder. The shape of contractions produced by the phyllolitorins and promptness of cessation of their action upon washing seem to indicate a looser binding of these peptides to their receptors and/or a more rapid inactivation, in comparison to litorin.[1]

References

  1. Parallel bioassay of litorin and phyllolitorins on smooth muscle preparations. Falconieri Erspamer, G., Mazzanti, G., Farruggia, G., Nakajima, T., Yanaihara, N. Peptides (1984) [Pubmed]
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