Fig. 3From: Evidence for the recent origin of a bacterial protein-coding, overlapping orphan gene by evolutionary overprintingMutations introduced to arrest the translation of nog1 (left) or citC (right) strand specifically. The numbers indicate the distance of the sequence shown from the start codons of nog1 and citC respectively. Note that the amino acid sequence of the reading frame in antisense remains unchanged in both cases. The positions of the mutations are shown in redBack to article page