BBA's Gene Structure and Expression covers DNA and RNA structure, DNA replication, damage and repair, gene re-arrangements and recombination, control of gene expression, transcription and translation mechanisms, RNA processing, cell-cycle control, nucleic acid-ligand interactions, DNA-modifying enzymes, viral systems and molecular genetics. This section also includes Short functional sequence-papers describing DNA and RNA sequences for protein coding, regulatory or structural elements combined with significant functional studies, and Promoter papers describing sequence and functional analysis of promoter and enhancer regions. Short functional sequence-papers are also published in other sections of BBA when this is more appropriate. This section welcomes papers on functional genomics that provide significant experiments that address the function of genes whose sequences and not function are already established. Types of papers:Regular papers, short sequence-papers, promoter papers, and rapid reports.