5´-T↓CTAGA-3´ 3´-AGATC↑T-5´

Important: Invitrogen restriction enzymes now come with Universal Buffers L, M, H, K, or T (+BSA) instead of REact® Buffers 1-8. Functionally, the enzymes are the same and have been validated for the recommended buffer. Please contact our technical services department immediately if you have questions or concerns.

Concentration	8-20 U/ µL
Contents	Xba I 10X Buffer M (1mL) 10X Loading Buffer (1mL)
Reaction Temperature	37°C
Reaction Mixture	Xba I 1 µL 10X Buffer M 2 µL 0.10% BSA 2 µL Substrate DNA <1 µg Sterile water to 20 µL
Heat inactivation	Enzyme inactivated by heating at 65°C for 20 minutes.
Star Activity	Unrelated site may be cut in the presence of high concentration of glycerol.
Effect of DNA Methylation	When the sequence includes the recognition site TCTAGATC, the enzyme activity is affected by dam methylase. In this case, DNA originated from E. coli cannot be cleaved by this enzyme.
Unit Definition	One unit is the amount of enzyme required to completely digest 1 µg of λDNA in 50 µL of the reaction mixture in one hour at 37°C.
10X Buffer M	100 mM Tris-HCl, pH 7.5 100 mM MgCl2 10 mM Dithiothreitol 500 mM NaCl
Source	Xanthomonas badrii

Relative Activity in Universal Reaction Buffers

Buffer	L	M	H	K	T(+BSA)
Relative Activity (%)	<20	80*	20	<20	120

*100% activity is obtained after addition of 0.01% BSA. For Research Use Only. Not intended for any animal or human therapeutic or diagnostic use.