A detection method includes forming a complex by binding a target substance and a dielectric particle modified by a single-domain antibody that is bindable to the target substance, separating the complex and an unbound particle in a fluid with dielectrophoresis, the unbound particle being the dielectric particle not forming the complex, and detecting the target substance contained in the separated complex with an imaging element.

A detection method includes forming a complex by binding a target substance and a dielectric particle modified by a single-domain antibody that is bindable to the target substance, separating the complex and an unbound particle in a fluid with dielectrophoresis, the unbound particle being the dielectric particle not forming the complex, and detecting the target substance contained in the separated complex with an imaging element.

The invention encompasses methods and test strips for detecting the presence of cerebrospinal fluid (CSF) in a biological sample with a lateral flow device which uses lectin conjugates, anti-antigen conjugates, an immobilized serum line, and an immobilized anti-antigen line.

The invention encompasses methods and test strips for detecting the presence of cerebrospinal fluid (CSF) in a biological sample with a lateral flow device which uses lectin conjugates, anti-antigen conjugates, an immobilized serum line, and an immobilized anti-antigen line.

An electrophoretic device for detecting biomarkers in collected bodily fluid and methods of using the same.

An electrophoretic device for detecting biomarkers in collected bodily fluid and methods of using the same.

Methods are provided for separating magnetically responsive beads from a droplet in a droplet actuator. Droplet operations electrodes and a magnet are arranged in a droplet actuator to manipulate a bead-containing droplet and position it relative to a magnetic field region that attracts the magnetically responsive beads. The droplet operations electrodes are operated to control the droplet shape and transport it away from the magnetic field region to form a concentration of beads in the droplet. The continued transport of the droplet away from the magnetic field causes the concentration of beads to break away from the droplet to yield a small, concentrated bead-containing droplet immobilized by the magnet.

Methods are provided for separating magnetically responsive beads from a droplet in a droplet actuator. Droplet operations electrodes and a magnet are arranged in a droplet actuator to manipulate a bead-containing droplet and position it relative to a magnetic field region that attracts the magnetically responsive beads. The droplet operations electrodes are operated to control the droplet shape and transport it away from the magnetic field region to form a concentration of beads in the droplet. The continued transport of the droplet away from the magnetic field causes the concentration of beads to break away from the droplet to yield a small, concentrated bead-containing droplet immobilized by the magnet.

The presently disclosed subject matter relates to compositions, systems and methods of screening one or more species of polypeptide in a complex mixture of polypeptides, e.g., multi-subunit proteins. For example, the subject matter relates to ligands used in connection with affinity capillary electrophoresis, as well as methods and systems for detecting polypeptides in a mixture of multimers that include multispecific antibodies, e.g., bispecific antibodies.

The presently disclosed subject matter relates to compositions, systems and methods of screening one or more species of polypeptide in a complex mixture of polypeptides, e.g., multi-subunit proteins. For example, the subject matter relates to ligands used in connection with affinity capillary electrophoresis, as well as methods and systems for detecting polypeptides in a mixture of multimers that include multispecific antibodies, e.g., bispecific antibodies.