Methods of detecting a target in a sample are provided. Kits for performing the methods described herein are also provided.

Methods of detecting a target in a sample are provided. Kits for performing the methods described herein are also provided.

Herein disclosed is a method for the normalization of an immunological test, characterized in that the presence of a comparable amount of cells is determined by a sandwich ELISA test in which the capture antibody includes at least one antibody that binds to at least one keratin selected from among keratin 4, 5, 6, 8, 10, 13 and 18 and the detection antibody includes at least one antibody that binds to the selected keratin.

Herein disclosed is a method for the normalization of an immunological test, characterized in that the presence of a comparable amount of cells is determined by a sandwich ELISA test in which the capture antibody includes at least one antibody that binds to at least one keratin selected from among keratin 4, 5, 6, 8, 10, 13 and 18 and the detection antibody includes at least one antibody that binds to the selected keratin.

A device for recovering a population of extracellular vesicles from a biological sample comprising extracellular vesicles and contaminants is described.

A device for recovering a population of extracellular vesicles from a biological sample comprising extracellular vesicles and contaminants is described.

The present invention concerns an in vitro method for measurement of 25-hydroxyvitamin D, wherein the potentially interfering compound 24,25-dihydroxyvitamin D.sub.3 is blocked by a binding agent specifically binding to 24,25-dihydroxyvitamin D.sub.3 and not binding to 25-hydroxyvitamin D.

The present invention concerns an in vitro method for measurement of 25-hydroxyvitamin D, wherein the potentially interfering compound 24,25-dihydroxyvitamin D.sub.3 is blocked by a binding agent specifically binding to 24,25-dihydroxyvitamin D.sub.3 and not binding to 25-hydroxyvitamin D.

The present invention provides compositions, kits, and methods for the detection of host cell proteins (HCPs) in biological samples. In some embodiments, the present invention utilizes immunization of ayes hosts with proteins derived from non-ayes host cells to produce ayes antibodies specific for non-ayes HCPs.

The present invention provides compositions, kits, and methods for the detection of host cell proteins (HCPs) in biological samples. In some embodiments, the present invention utilizes immunization of ayes hosts with proteins derived from non-ayes host cells to produce ayes antibodies specific for non-ayes HCPs.