This CCDS representation is supported by transcript data, including the mRNAs BC088357.1 and AK313221.1. The 5'-most in-frame translational start codon is annotated, but it should be noted that this start codon is specific to primate species. This start codon also has a weak Kozak signal, and thus it is possible that leaky scanning by the ribosome will sometimes occur to allow initiation at a downstream start codon. The downstream start codon has a stronger Kozak signal and is much more widely conserved. Translation from the downstream start codon would result in a protein that is 11 aa shorter at the N-terminus. An alternative 5' end variant that encodes the shorter protein is represented by CCDS3831.1.