Abstract: The use of monomers of active a-amino acids for the preparation of hydrophobic polypeptides in the form of precipitates, whereby the polypeptides result from the polymerization of the aforementioned monomers of active a-amino acids in an aqueous solvent and can be resolubilized in the solvent.

Abstract: The invention relates to compounds selected from: peptides having formula (1): C(s)—X1—X2—X3—X4—X5—X6—X7-C(s), wherein the two cysteine residues are linked by means of a disulphide bridge which is represented by symbol C(s) and X1, X2, X3X4, X5, X6 and X7 denote amino acids selected from a determined list; and derivatives of said peptides. The invention also relates to compositions comprising same and to the use thereof as anti-microbial agents.

Abstract: The present invention relates to a kit for the specific assay of Angiotension II, comprising:the anti-Ang II antibody,a solution of labelled Ang II,solutions containing the Ang II standards at known and increasing concentrations,the requisite washing solution(s),a solution of anti-Ang III antibody, the said antibody exhibiting a cross-reaction with Ang II of less than 10% and preferably less than 5%,and, optionally, a solution of anti-Ang I antibody and/or a solution of anti-pentapeptide antibody and/or a solution of anti-hexapeptide antibody, the said antibodies exhibiting a cross-reaction with Ang II of less than 10% and preferably less than 5%.