Antinociceptive effect induced by a PnPP-19 derivative: new insights into venom peptides targeting opioid receptors. (5th March 2019) - Nogueira Freitas, Ana Cristina; Peigneur, Steve; Marcondes Machado, Marcelo Ferreira; Carmona, Adriana Karaoglanovic; Tytgat, Jan; Elena de Lima, Maria