ABTAP is an alias for the gene, ESF1 nucleolar pre-rRNA processing protein homolog, in humans. Other names include: ESF1 homolog; ABT1-associated protein; C20orf6; ESF1, nucleolar pre-rRNA processing protein, homolog (S. cerevisiae); HDCMC28P; bA526K24.1. The encoded protein has an amino acid length of 851 and a mass of 98.8 kDa. ABTAP is a member of the ESF1 family. This gene shares homology with other species, including: Mouse, Yeast, Rat, Zebrafish, Frog, Chicken.