Fig. 1
From: On the possibility of death of new genes – evidence from the deletion of de novo microRNAs
mir-977 evolution. a mir-977 genomic location. b mir-977 sequence and expression level evolution. mir-977 have fast sequence evolution and strong expression divergence among species. Species abbreviations: D. mel: D. melanogaster; D. sim: D. simulans; D.ere: D. erecta D. pse: D. pseudoobscura; D. vir: D. virilis. Expression level categories are: high, RPM > 5000; medium, RPM > 500; low, RPM > 50; nearly undetectable: RPM < 50