TTC21A, Official Symbol TTC21Aprovided by HGNC Official Full Name tetratricopeptide repeat domain 21Aprovided by HGNC Primary source HGNC:HGNC:30761 See related Ensembl:ENSG00000168026 MIM:611430; AllianceGenome:HGNC:30761 Gene type protein coding RefSeq status VALIDATED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as STI2; Thm2; SPGF37; IFT139A Summary Involved in flagellated sperm motility and spermatid development. Predicted to be located in cilium. Predicted to be part of intraciliary transport particle A. Implicated in spermatogenic failure 37. [provided by Alliance of Genome Resources, Apr 2022] Expression Biased expression in testis (RPKM 39.0) and lung (RPKM 1.7) See more Orthologs mouse all