The recognition sequence for TelN lies within telRL. tos (in pJD104), telRL (in pJD105), and telO (in pJD106) were linearized with AatII and then incubated with 1 pmol of TelN protein (70 units); 0.15 pmol of DNA was applied per assay. Lanes a, c, and e, TelN omitted; lanes b, d, and f, in the presence of TelN; lane g, size marker (1-kb DNA ladder).