Filler in textured paint works like spackling compound to fill the cracks, and dark, flat paint absorbs light to help conceal remaining blemishes. Be aware that dark colors will make your ceiling appear lower, so consider using very dark colors only in normally proportioned or narrow rooms.
In genetics, a promoter is a region of DNA that initiates transcription of a particular gene.
For transcription of genes by RNA polymerase III, the promoter is sometimes located in a segment within the transcribed part of the gene, between +40 and +80, but can also be partially upsteam or entirely upstream fro the start site.