Transmembrane protein 50b (C21orf4), a candidate for Down syndrome neurophenotypes, encodes an intracellular membrane protein expressed in the rodent brain.
Moldrich RX, Lainé J, Visel A, Beart PM, Laffaire J, Rossier J, Potier MC. Neuroscience. 2008 Jul 17; 154(4):1255-66. Epub 2008 Mar 4.