E-Shot DH10B T1R Electrocomp cells are competent E. coli pre-aliquotted in convenient, single-use, 0.1 cm universal-fit cuvettes ready for electroporation. Fewer pipetting steps are required, and freeze-thaw cycles can be eliminated. The cells feature reliable, high transformation efficiencies — 1 × 10¹⁰ cfu/μg DNA. The complete kit includes 20 pre-aliquotted cuvettes, and each cuvette contains 25 μl of electrocompetent E. coli, one extra pre-aliquotted cuvette for a control transformation, SOC recovery coli media and pUC19 control DNA. Invitrogen Corp. 800-955-6288 www.invitrogen.com