Abstract: A method, comprising the steps of providing a sample containing contaminating nucleoside diphosphates and/or nucleoside triphosphates, such as ATP and/or ATP analogues including deoxyribonucleoside triphosphates; reducing the amount of the contaminating nucleoside diphosphates and/or nucleoside triphosphates in the sample with an apyrase enzyme, wherein said apyrase enzyme is a Shigella flexneri apyrase; and performing an analysis of the sample, wherein said analysis comprises an assay that would have been affected by the contaminating nucleoside diphosphates and/or nucleoside triphosphates had they not been reduced in the reduction step.

Abstract: The invention provides a device and methods for separating and isolating cells.

Abstract: Leukocytes (e.g., neutrophils, monocytes and/or lymphocytes) can be captured and separated from blood by removing platelets using a spiral channel, followed by capturing individual leukocyte types in a series of cell capture channels having leukocyte binding moieties. Accordingly, various microfluidic-based cell affinity chromatography methods can be used to separate leukocytes from whole blood.