Descripción: GST Selector is based on a high-affinity single-domain antibody (sdAb) that is covalently immobilized on 4% cross-linked agarose beads. The innovative, oriented and selective attachment via a flexible linker guarantees a high accessibility of the sdAbs and largely eliminates batch-to-batch variations. Due to the single-chain nature of sdAbs and their covalent attachment, no "leakage" of light and heavy chains from IgGs is observed during elution with SDS sample buffer. GST Selector thus features high affinity and superior capacity for GST fusion proteins while showing negligible non-specific background. GST Selector is compatible not only with physiological buffers but also with high stringency buffers (see Product Data Sheet). GST Selector thus provides great freedom to adjust the binding and washing conditions to the experimental needs.