Mixed-Mode Chromatography


Mixed-Mode Chromatography

Mixed-Mode or Multimodal Chromatography expands the range of chromatographic modes applied in biopurification. Mixed-Mode media combine ionic and hydrophobic interactions and offer new selectivities and a higher salt tolerance than traditional ion exchange media.


Mixed-Mode Resins are especially suited for the purification of target molecules that are difficult to purify using common purification platforms. Mixed-mode media can be used for direct processing of clarified feedstocks at physiological salt concentrations as well as for intermediate and polishing applications, such as mAb aggregate removal.

TOYOPEARL Mixed-Mode Resins

TOYOPEARL MX-Trp-650M is a high capacity mixed-mode resin. This resin uses tryptophan as the active ligand and is based on a hydroxylated polymethacrylic polymer bead. The amino acid tryptophan has both weak carboxyl cation exchange and indole hydrophobic functional groups. The selectivity of the resin can be adjusted through control of binding or elution pH, ionic strength, salt type and additives. This multi-modal resin maintains dynamic binding capacity (DBC) at elevated feedstock and buffer conductivities.

In addition to fast binding and elution kinetics (see figure), TOYOPEARL MX-Trp-650M minimizes the amount of WFI needed for either feedstock dilution during capture or column elution further downstream, leading to lower in-process pool volumes and higher throughput.

TOYOPEARL MX-Trp-650M maintains a high DBC even after extended CIP (clean in place) cycles using 0.5 mol/L NaOH, as demonstrated in the figure below.

This resin is also available in pre-packed SkillPak columns to simplify your process development and scale up.

Structure of TOYOPEARL MX-Trp-650M



Stability in 0.5 mol/L NaOH

Resin: TOYOPEARL MX-Trp-650M
Alkaline cleaning (CIP) conditions
3CV: 0.5 mol/L NaOH,
5CV: 0.1 mol/L Tris-HCl, pH 8.5 + 0.3 mol/L NaCl
Flow rate: 212 cm/hr (1.0 mL/min)
DBC Measurement
Column size:
6 mm ID × 4 cm
Binding buffer: 0.05 mol/L acetate buffer, pH 4.7 + 0.1 mol/L NaCl
Flow rate: 212 cm/hr (1 mL/min)
Detection: UV @ 280 nm
Sample: polyclonal human IgG
Sample Load: 1 mg/mL


Narrow elution peak widths

Column size:6 mm ID × 4 cm
Mobile phase:Buffer A: 0.05 mol/L acetate buffer, pH 4.7 + 0.1 mol/L NaCl (12 mS/cm)
Buffer B: 0.1 mol/L Tris-HCl buffer, pH 8.5 + 0.3 mol/L NaCl
Flow rate:A: 212 cm/hr (1.0 mL/min)
B: 424 cm/hr (2.0 mL/min) started at 124 min
Detection:UV @ 280 nm
Sample:CHO cell culture media, monoclonal antibody (1 mg/mL) diluted with buffer A


Pore size (mean) 100 nm
Particle size (mean) 75 µm
Shipping buffer 20% ethanol
pH stability 3-13
Stability data 10 years (estimated) 


Ordering Information

P/N Description Resin Volume
0022817 TOYOPEARL MX-Trp-650M 25 mL
0022818 TOYOPEARL MX-Trp-650M 100 mL
0022819 TOYOPEARL MX-Trp-650M 1 L
0022820 TOYOPEARL MX-Trp-650M 5 L
0045224 SkillPak 1 MX-Trp-650M 5 x 1 mL col. 7 mm ID x 2.5 cm L
0045261 SkillPak 5 MX-Trp-650M 5 mL col. 8 mm ID x 10 cm L
0045344 SkillPak 50 MX-Trp-650M 50 mL col. 2.5 cm ID x 10 cm L
0045345 SkillPak 200 MX-Trp-650M 200 mL col. 5 cm ID x 10 cm L
0045231 SkillPak Mixed Mode 1 mL col. library
(Ca++Pure-HA, MX-Trp-650M 1 mL x 3 ea)
7 mm ID x 2.5 cm L
0045265 SkillPak Mixed Mode 5 mL col. Library
(Ca++Pure-HA, MX-Trp-650M 5 mL x 1 ea)
8 mm ID x 10 cm L