The coding region has been updated to start at an alternate in-frame start codon that is supported by conservation data or a publication. PMID:3463993 suggests that the downstream AUG codon is the translation start site from evidence provided by N-terminal sequencing of the human protein. Although this may be the dominant translation start site, it is possible that some translation also occurs from the upstream AUG which is 27 nt upstream of the annotated start for this CCDS. The upstream AUG is in a weak Kozak context so a possible mechanism is that leaky scanning by ribosomes occurs so that, in most cases, ribosomes continue scanning and use the downstream AUG as the translation initiation site.