Abstract: A system and method of mixing and injecting discrete sample mixtures into a flow cytometer or other sample analysis apparatus may generally comprise a sample injection guide coupling a liquid handling apparatus with a sample analysis apparatus and facilitating injection of discrete sample mixtures into a fluidic system of the apparatus.

Abstract: The present disclosure provides compositions and methods for high throughput Gain of Function (GOF) sorting to discover and develop novel and highly selective candidate drug molecules. High throughput GOF sorting includes: mutating a single residue in a receptor and/or ligand; measuring the affinity and functional activity of the resulting ligand target-ligand interaction; and carrying out multiple rounds of mutation and measurement to determine which residues provide key interaction points underlying the functional activity of a ligand target-ligand interaction. Further, the present disclosure provides methods and compositions for high throughput and high precision GOF sorting, such that large numbers of mutations can be generated and screened rapidly, and GOF compounds can be identified and isolated.

Abstract: The present disclosure provides systems for multiplexed multitarget screening of cell populations having one or more wild type or mutated ligand targets and measuring cell responses to ligands using high throughput screening techniques, including flow cytometry (FCM). The method includes the steps of: 1) developing cell populations to be screened; 2) staining cell populations using one or more fluorochromes to yield a distinct excitation/emission signature for each cell population; 3) combining labelled cell populations into a single mixed suspension; 4) analyzing populations to resolve them on the basis of their unique signature; and 5) resolving individual populations and deconvoluting data to extract meaningful information about populations.