Tyrothricin

IVM, (+)-bicuculline, and MRS2179 tetrasodium salt were obtained from Tocris (R&D Systems, Inc, Minneapolis, MN). Isradipine and alexidine hydrochloride were purchased from Cayman Chemical Company (Ann Arbor, MI). PMA, carbamoylcholine chloride (carbachol), forskolin, tyrothricin, and benzalkonium chloride were obtained from Sigma-Aldrich (St. Louis, MO). Suloctidil, tomatine, isoetharine mesylate, tacrine hydrochloride, pipamperone, dyclonine hydrochloride, and desoxycorticosterone acetate were purchased from MicroSource Discovery Systems, Inc.

Gramicidin S, gramicidin D, tyrothricin, gentamicin, resazurin sodium salt, and KCl was supplied by Sigma (St. Louis, MO, USA). Acetonitrile, HPLC-grade far UV cut-off was supplied by Romil Ltd. (Cambridge, UK). Merck (Darmstadt, Germany) supplied agar, yeast extract, tryptone, Na₂HPO₄, and KH₂PO₄; and Merck (Wadeville, South Africa) supplied sodium chloride, brain heart infusion broth, and black 96-well polystyrene plates. From Corning (Kennebunk, ME, USA), 96-well polystyrene plates were acquired, and cellulose filters (Paper) (MN 615/No 1) were obtained from Macherey-Nagel (Düren, Germany). Mixed cellulose ester filters (HAWP, GSWP) were supplied by Waters-Millipore (Milford, MA, USA). Polycarbonate filters were supplied by Nuclepore Corp (Plesanton, CA, USA), and cellulose nitrate was provided by Sartorius (Gottingen, Germany). AcroPrepTM Advance 96 filter plates were sourced from Pall Corporation (Ann Arbor, MI, USA). Analytical grade water was obtained filtering water from a reverse osmosis plant through Millipore Milli Q^® water purification system (Milford, MA, USA). Melittin, magainin 2, leucocin A, and PGLa was sourced from of the BIOPEP^TM peptide library (Stellenbosch University, South Africa).