This locus represents naturally occurring read-through transcription between the neighboring SLX1B (SLX1 structure-specific endonuclease subunit homolog B) and SULT1A4 (sulfotransferase family, cytosolic, 1A, phenol-preferring, member 4) genes on the short arm of chromosome 16. A duplicate read-through locus also exists between the SLX1A and SULT1A3 genes located approximately 730 kb downstream on the same chromosome. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Feb 2017]