The SFB Expansion kit (EXP-SFB001), containing 4 vials of the Short Fragment Buffer (SFB), is required for use with the PCR tiling of COVID-19 virus protocols.

The SFB is also part of the Ligation Sequencing Kit (SQK-LSK109) and the Ligation Sequencing Kit XL (SQK-LSK109-XL).

Therefore, the expansion kit can provide extra SFB, if needed, during the ligation library prep to sequence DNA fragments shorter than 3kb.

More details on the SFB Expansion kit (EXP-SFB001) can be found on its Store page.