LZ needs two papers to study:
1. Griffiths-Jones S, Grocock RJ, van Dongen S,Bateman A, Enright AJ. miRBase: microRNA sequences,targets and gene nomenclature. Nucleic Acids Res 2006;34:D140–4.
2. Ambros V, Bartel B, Bartel DP, Burge CB, Carrington JC, Chen X, et al. A uniform system for
microRNA annotation. RNA 2003;9:277–9.