Custom Premix Selecting "Custom Premix" option means that all of the beads you have chosen will be premixed in manufacturing before the kit is sent to you.
The Magnetight™ Oligo(dT) beads are encapsulated paramagnetic particles containing covalently attached oligo(dT)25 to directly bind mRNA. The coated magnetite beads have been treated to minimize non-specific interactions and enable quantitative recovery of intact mRNA.