 At the same time there is little or no evidence for protein expression for genes that have appeared since primates or that do not have any protein-like features or conservation.
<meaning-changed>  At the same time there is little or no evidence for protein expression for genes that have appeared since primates or that do not have any protein-like features or conservation.
 At the same time there is little or no evidence for protein expression for novel genes, those that have appeared since primates or that do not have any protein-like features or conservation.