Dear all !

In the paper of sequencing of allotetraploid cotton (which published on Nature biotechnology, 33(5), 2015), the author said that they filtered EVM out gene models through " The gene models were further filtered based on their Cscore, peptide coverage and its CDS overlapping with TEs. Only transcripts with a C-score >= 0.5, and peptide coverage >= 0.5m, were retained". Now I want to know what is Cscore and how to calculate it ? I have searched through Google many times, but noting about this words was found.