Strep-Tactin®XT 4Flow® - Resin with enhanced properties

High-performance Strep-Tactin®XT 4Flow® replaces Strep-Tactin®XT Superflow®

Our powerful resins, Strep-Tactin®XT 4Flow® and Strep-Tactin®XT 4Flow® high capacity, have replaced Strep-Tactin®XT Superflow® as well as Strep-Tactin®XT Superflow® high capacity as of July 1st, 2021. In comparison to Strep-Tactin®XT Superflow® resins, Strep-Tactin®XT 4Flow® resins have improved and enhanced properties and are, therefore, our Strep-Tactin®XT resins for the future.
Strep-Tactin®XT 4Flow® and the high capacity variant are perfectly suitable for efficient protein purification independent from the protein class, including challenging proteins, low abundant proteins and especially large proteins. Furthermore, the broad pH stability enhanced the compatibility with different buffer compositions.

Comparison of Strep-Tactin®XT 4Flow® resins with Strep-Tactin®XT Superflow®

   Strep-Tactin® XT 4Flow®   Strep-Tactin®XT Superflow® 
 pH stability  4-10  6-10
 Protein binding capacity  High  High
 Addressed protein size  Small to large proteins  Small to medium proteins (< 90 kDa)
 Yield of low abundant proteins  Excellent  Excellent
 Yield of large proteins  5-fold increased  Acceptable
 Compatible with challenging proteins  Perfectly suitable  Perfectly suitable

4Flow® products at a glance

Strep-Tactin®XT 4Flow® resin
50% suspension to purify Strep-tag®II or Twin-Strep-tag® fusion proteins
Strep-Tactin®XT 4Flow® high capacity resin
50% suspension to purify Strep-tag®II or Twin-Strep-tag® fusion proteins
Strep-Tactin®XT 4Flow® high capacity column
Content: 1 ml
Gravity flow column to purify Strep-tag®II or Twin-Strep-tag® fusion proteins
Strep-Tactin®XT 4Flow® cartridge
HPLC/FPLC cartridge to purify Strep-tag®II or Twin-Strep-tag® fusion proteins
Strep-Tactin®XT 4Flow® high capacity cartridge
HPLC/FPLC cartridge to purify Strep-tag®II or Twin-Strep-tag® fusion proteins
Strep-Tactin®XT 4Flow® column
Content: 1 ml
Gravity flow column to purify Strep-tag®II or Twin-Strep-tag® fusion proteins