Ribosomal protein S9 (RPS9) is one of the 21 proteins which belong to the 30S  of the bacterial ribosome or the 30 proteins which belong to the 40S small subunit of the eukaryotic ribosome. 
  3D Structures of Ribosomal protein S9 
Updated on 03-June-2015
 S9 in part of small ribosomal subunit
3iy8 - EcRPS9+EcRPS5+EcRPS6+EcRPS9+EcRPS8 EcRPS11+EcRPS12+EcRPS15+EcRPS16+EcRPS17+EcRPS18+Leishmania taretolae mRNA - Escherichia coli
3jyv – RPS9+RPS0+RPS2+RPS3+RPS5+RPS11+RPS13+RPS14+RPS15+RPS16+RPS18+RPS20+RPS22+RPS23+RPS29+18S RRNA+RACK1+S19E+tRNA – Cryo-EM -  Thermomyces lanuginosus
2r1g – TtRPS9+TtRPS12+TtRPS13+16S RRNA helices - Thermus thermophilus