© 2014 Wiley Periodicals, Inc.. This is the accepted version of the following article: Predicting backbone Ca angles and dihedrals from protein sequences by stacked sparse auto-encoder deep neural network Journal of Computational Chemistry, Vol. 35(28), 2014, pp. 2040-2046, which has been published in final form at dx.doi.org/10.1002/jcc.23718.