Please cite the following papers when using the server and data at this website:
  1. Qiu, W. R., Xiao, X, Chou,K. C. Lin, W. Z. Prediction of lysine ubiquitination sites in proteins by extracting sequence evolution information via grey system model.(submitted)
  2. Wang, P., Xiao, X., Chou, K. C. (2011) NR-2L: a two-level predictor for identifying nuclear receptor subfamilies based on sequence-derived features. PLoS ONE. 6(8):e23505. doi: 10.1371/journal.pone.0023505