Abstract: Mixed mode ligands, as well their use for purifying proteins, are provided.

Abstract: A compound, (4s)-1-azaadamantane-4yl formate ester, is described. In addition, a process is described for preparing (4s)-1-azaadamantane-4yl formate ester, aminothiadiazole-phenyl phosphate salt, bromothiadizole-phenyl or (4s)-4-(5-phenyl-1,3,4-thiadiazol-2-yloxy)-1-azatricyclo[3.3.1.13,7]-decane dihydrogen citrate. Furthermore, a process is described, comprising step of hydrolyzing (4s)-1-azaadamantane-4yl formate ester to form (4s)-1-azaadamantan-4-ol HBr salt.

Abstract: A compound, (4s)-1-azaadamantane-4yl formate ester, is described. In addition, a process is described for preparing (4s)-1-azaadamantane-4yl formate ester, aminothiadiazole-phenyl phosphate salt, bromothiadizole-phenyl or (4s)-4-(5-phenyl-1,3,4-thiadiazol-2-yloxy)-1-azatricyclo[3.3.1.13,7]-decane dihydrogen citrate. Furthermore, a process is described, comprising step of hydrolyzing (4s)-1-azaadamantane-4yl formate ester to form (4s)-1-azaadamantan-4-ol HBr salt.

Abstract: A compound, (4s)-1-azaadamantane-4yl formate ester, is described. In addition, a process is described for preparing (4s)-1-azaadamantane-4yl formate ester, aminothiadiazole-phenyl phosphate salt, bromothiadizole-phenyl or (4s)-4-(5-phenyl-1,3,4-thiadiazol-2-yloxy)-1-azatricyclo[3.3.1.13,7]-decane dihydrogen citrate. Furthermore, a process is described, comprising step of hydrolyzing (4s)-1-azaadamantane-4yl formate ester to form (4s)-1-azaadamantan-4-ol HBr salt.

Abstract: Aminoglycoside-polyamines are disclosed along with methods of use thereof in displacement chromatography and as DNA-binding ligands. The aminoglycoside-polyamines are derivatives of carbohydrates, such as sugars, amino sugars, deoxysugars, glycosides, nucleosides and their substituted counterparts. The subject polyamines possess a group in place of at least one hydrogen atom of at least one hydroxyl group of the carbohydrate compound. In these compounds R1 is an alkyl group or an azaalkyl group, and R2 is a primary or secondary amino group.

Abstract: A bioproduct may be selectively separated from one or more impurities by means of a displacement chromatography system that includes a solvent, a chromatographic resin and a chemically selective displacer. The method includes: dissolving the bioproduct and the one or more impurities in a solvent; loading the bioproduct and the one or more impurities, in the solvent, on a chromatographic resin; displacing the bioproduct from the chromatographic resin with chemically selective displacer; and retaining the one or more impurities on the chromatographic resin. For this method, the bioproduct and the impurities have similar binding affinity for the chromatographic resin in the absence of the displacer.

Abstract: An effective technique for the high throughput screening of displacers is described. In this technique, potential displacers are employed to displace a biomolecule (e.g., protein) adsorbed on a chromatographic resin in small-scale batch displacement experiments. The amount of protein displaced from a specific resin by a defined concentration of displacer is determined by monitoring the supermatant for the protein. By evaluating the displaced protein rather than the displacer itself, this technique enables a single detection technique (e.g., absorbance, fluorescence, etc.) to be employed for all batch displacement experiments. By monitoring the amount of protein displaced, the effacy of a large number of potential displacers can be rapidly evaluated. The entire experimental procedure can be carried out rapidly and is thus amenable to high throughput parallel screening of molecules possessing a large range of affinities and physico-chemical properties.