Prevents inappropriate targeting of non-secretory polypeptides to the endoplasmic reticulum (ER). Binds to nascent polypeptide chains as they emerge from the ribosome and blocks their interaction with the signal recognition particle (SRP), which normally targets nascent secretory peptides to the ER. Also reduces the inherent affinity of ribosomes for protein translocation sites in the ER membrane (M sites) By similarity. Isoform 1 and isoform 2 appear to bind DNA and play roles in transcription. May act to regulate the expression of genes involved in the development of myotubes.Shipped at 4°C. Store at 4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C long term. Avoid freeze / thaw cycle. *   http://www.creative-diagnostics.com/Anti-NACA-PAb-203153-147.htm