It further provides for optional additional purification steps, including lysate filtration, anion exchange chromatography, triplex affinity chromatography, and hydrophobic interaction chromatography.

进一步提供了可选择的额外的纯化步骤，包括溶胞产物过滤、阴离子交换层析、三联体亲和层析和疏水性相互作用层析。

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The optional Tether Kit offers additional flexibility to users who do not want to permamently attach the laptop locking station to a desktop surface.

ENGADGET: Kensington's Laptop Locking Station is a thief's worst nightmare... maybe

Mustang will be the first vehicle that will offer AppLink with the standard SYNC interface, as well as be integrated into the optional Voice-Activated Navigation System, providing the additional convenience of an 8-inch touch screen for control.

ENGADGET: Ford SYNC AppLink hands-on in a little green Fiesta