SPESP1, Official Symbol SPESP1provided by HGNC Official Full Name sperm equatorial segment protein 1provided by HGNC Primary source HGNC:HGNC:15570 See related Ensembl:ENSG00000258484 MIM:609399; AllianceGenome:HGNC:15570 Gene type protein coding RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as ESP; SP-ESP Summary The encoded protein is a human alloantigen involved in sperm-egg binding and fusion. [provided by RefSeq, Apr 2010] Expression Biased expression in testis (RPKM 44.1), placenta (RPKM 5.7) and 4 other tissues See more Orthologs mouse all