Before revision:  We suggest that many of these 2,001 genes do not code for proteins under normal circumstances and that they should not be included in the human protein coding gene catalogue  .
After revision:  We suggest that many of these 2,001 genes do not code for proteins under normal circumstances and that they should not be included in the human protein coding gene catalogue . These potential non-coding genes will be revised as part of the ongoing human genome annotation effort .