![XL1-Blue Competent Cells XL1-Blue Competent Cells](/cs/publishingimages/Competent Cells MC-320x320.jpg)
XL1-Blue Competent Cells
For the greatest number of colonies, use electroporation-competent XL1-Blue cells or the high-efficiency derivative, XL2-Blue ultracompetent cells. When ultimate efficiency is not as critical, try the supercompetent-grade, competent-grade, or the subcloning grade competent cells.