Taken directly from NEB's website, this is the protocol for using their optimized sticky-end ligation and transformation. For more information, see https:\/\/www.neb.com\/products\/m0370-instant-sticky-end-ligase-master-mix.Instant Sticky-end Ligase Master Mix is a ready-to-use 2X solution of T4 DNA ligase and a proprietary ligation enhancer in an optimized reaction buffer. Specifically formulated to rapidly ligate cohesive-end (2\u20134 bp) substrates and improve transformation, the mix simplifies reaction set-up and provides an optimized ratio of enzyme and buffer components. No thawing of the master mix is required as it maintains a liquid state during storage at -20\u00b0C* and no incubation time is necessary to achieve ligation efficiencies sufficient for successful sub-cloning of sticky-end substrates. Just add the master mix to DNA with compatible ends, mix and transform; thereby reducing the valuable time needed for routine ligations. Ligations for subcloning can be carried out in small volumes with low concentrations, allowing users to conserve precious DNA samples, and be used directly to transform many strains of chemically competent E. coli without dilution. * Freezers vary in their actual internal temperature. Our testing demonstrates that the master mix is liquid at -20\u00b0C. Freeze-thaw testing at -70\u00b0C has confirmed that the performance after 20 freeze\/thaw cycles is close to the original mix. Purified from an E. coli strain containing a recombinant gene encoding T4 DNA Ligase. 1X Instant Sticky-end Ligase Master Mix with DNA substrates in a 10 \u03bcl reaction volume. A 10 \u03bcl reaction contains 1800 cohesive end units of T4 DNA Ligase.