Dolomite Bio, Royston, UK, has launched an injection valve and sample loop for single cell RNA sequencing workflows. The option enables straightforward, gentle introduction of evenly distributed mRNA capture beads into the company’s RNA-Seq system for individual encapsulation of cells. The injection valve and sample loop is a complete module allowing barcoded mRNA capture beads in lysis buffer to flow efficiently through the RNA-Seq chip without clustering or blockages. Bead damage prior to encapsulation is negligible as harsh mechanical stirring is unnecessary. A four-way valve and simple, compact microfluidic connections enable seamless switching between the injection of the bead suspension and pumping of a driving fluid, with minimal dead volume and bead wastage compared to traditional syringe pump methods. The integrated mirror and chip holder enable easy visualization via the system’s high-speed microscope and camera. For more information, visit Dolomite Bio.