Synthetic peptide amino acids 303-317 (LEWIEMPVMPDISAH, C-terminal tail) of human QKI-7 (also known as Isoform 5 of Protein quaking, HqkI and Hqk, accession number Q96PU8-5) Mouse: 100% identity (15/15 amino acids identical) Rat: 100% identity (15/15 amino acids identical) No identity with QKI-5, QKI-6 and QKI-7b