Genome Location
Human
miR-181a1 and miR-181b1 are clustered together and located on the chromosome 1 (37.p5), miR-181a2 and miR-181b2 are clustered together and located on the chromosome 9 (37.p5). miR-181c and miR-181d are clustered together and located on the chromosome 19 (37.p5).
Read more about this topic: Mir-181 Micro RNA Precursor