The College of Pharmacy at University of Basrah organized a seminar about the miniature crosslinking DNA molecule by the assistant prof.Dr.Rafif Amer Abdul-Jabbar The seminar discussed the explained of the ability of small molecules of the RNA to regulate the gene expression of some genes in all living organisms and the possibility of using these small molecules as a drug to treat many diseases such as acute porphyric hepatitis, and the approval of a section of these small molecules as drugs by the FDA .The lecture aimed to increase experiments in order to expand the use of these molecules in wider therapeutic fields.