Naccess and POPS-R SASAs buried by the overlap between different components of 30S from the high resolution structure (10). Black and gray bars correspond to the Naccess hydrophobic and hydrophilic SASAs, respectively, while red and pink bars are the corresponding POPS-R SASAs. Cntrl, 3′-M and 3′-m indicate the central, 3′-major and 3′-minor domains, respectively.