The 30S Subunit

The following image is the whole 30S subunit.
30S subunit
The small subunit has a head and base and an armlike platform. It has a crucial role in decoding mRNA by providing the A, P, and E binding sites and by being responsible for monitoring base-pairing between the codon on mRNA and the anticodon on tRNA. The 30S subunit is composed of 16S rRNA and 21 ribosomal proteins. Using crystal diffraction and NMR methods, it is possible to obtain information on fine structure.
Learn more about 16S rRNA
Learn more about the ribosomal proteins

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References