Abstract:
A new adsorbent of a porous mineral oxide material with apatite crystals, preferably hydroxyapatite crystals, in the pores of the mineral oxide material is disclosed. The adsorbent is useful for protein and nucleic acid separations
Abstract:
This invention provides methods and materials for mapping interaction characteristics between components of a multicomponent biological complex. The methods involve capturing a multicomponent complex on a solid support and washing the support with a series of elution washes forming a gradient of solute concentrations, and determining whether a particular elution wash eluted a particular component.
Abstract:
The present invention provides a substrate having a polymerized, polysaccharide-based hydrogel attached to the surface. The hydrogel can be derivatized with binding functionalities that bind analytes from a sample. The invention further provides methods of using the device and gels that are capable of selectively binding one or more analytes from a sample.
Abstract:
A polymer that is useful for separating plasmid DNA from cell lysates can be dispersed throughout the pores of a porous matrix, forming a chromatographic sorbent. Illustrative of such a polymer is one that comports with the formula: 1 where R1 is C1-6 alkyl; each R2 is independently selected from the group consisting of H and C1-6 alkyl, optionally substituted with 1 to 3 OH groups; R3 is selected from H, C1-14 alkyl, and (C1-14 alkyl)aryl; each n is independently an integer from 1 to 6; a is at least 1; b is at least 1; w is an integer from 0 to 10; and z is at least 1. X is an anion; each Y is independently selected from the group consisting of H, C1-6 alkyl, and a linear homopolymer comprised of monomers, each of them substituted with pendant amines, provided that at least one Y is the linear homopolymer; and null-----null represents the remainder of the polymer.
Abstract:
For certain mixed mode resins having anionic character, a ligand is joined to a solid support via a linkage that includes a mercapto-, ether- or amino-containing moiety. A suitable ligand comprises an aromatic group, a heteroaromatic group, or a heterocyclic group, optionally fused, that is sulfate-, sulfonate-, phosphonate- or phosphate-substituted and that is linked to such a moiety. These resins possess an anionic character under conditions prescribed for their use. Separation of a biological substance, such as a peptide or protein, can be accomplished with a resin of this type via a change in the pH of eluants, thereby effecting adsorption and desorption.
Abstract:
The invention provides methods of monitoring the production of a target polypeptide by generating surface enhanced laser desorption/ionization mass spectral profiles of samples taken from multiple cell culture batches or of samples taken at different times from a given batch. The invention additionally provides methods for monitoring the purification of a target polypeptide from a mixture by generating surface enhanced laser desorption/ionization mass spectral profiles of samples taken at various times during a purification process. In addition, the invention relates to methods of identifying conditions that can be used in increasing the scale of a given purification process.