TA Cloning™ Kit, with pCR™2.1 Vector, without competent cells
TOPO® TA Cloning™ Kit From Invitrogen | Biocompare Product Review
PLOS ONE: An Alternative Method to Facilitate cDNA Cloning for Expression Studies in Mammalian Cells by Introducing Positive Blue White Selection in Vaccinia Topoisomerase I-Mediated Recombination