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.
Mark A. Rizzo, et al. (2004) An improved cyan fluorescent protein variant useful for FRET. Nature Biotechnology22, 445-449.
Tatiana Suarez, Subhasis B. Biswas and Esther E. Biswas. (2002) Biochemical defects in retina-specific human ATP binding cassette transporter nucleotide binding domain 1 mutants associated with macular degeneration. Journal of Biological Chemistry277, 21759-21767.