Abstract:
The present disclosure provides assays and devices for forming, spacing, and/or detecting droplets. The droplets may be emulsions composed of two or more immiscible fluids. An emulsion can be a double emulsion, such as water-in-oil droplets that are present in a continuous aqueous phase. The double emulsion can be formed when the water-in-oil droplets are contacted with one or more streams of aqueous fluid(s). This disclosure also provides a variety of additives that can be added to the fluids.
Abstract:
This invention provides compositions and methods for detecting differences in copy number of a target polynucleotide. In some cases, the methods and compositions provided herein are useful for diagnosis of fetal genetic abnormalities, when the starting sample is maternal tissue (e.g., blood, plasma). The methods and materials described apply techniques for allowing detection of small, but statistically significant, differences in polynucleotide copy number.