some effects ( i.e . implication of 1 tyrosine , 1 phenylalanine , and some arginine and lysine residues ) are seen with both 30 s subunits and rrna while others ( i.e . implication of a second tyrosine or phenylalanine residue of a group of hydrophobic residues and , possibly , of the single histidine residue ) , seen only or preferentially with 30 s subunits , may reflect additional interactions exclusively occurring at the ribosomal level .
C0035701
rrna
C0035553
ribosomal