Recombinant S1 protein of Synechocystis sp. strain PCC6803, one Flag-tag sequence (N-DYKDDDDK-C) was added to the C-terminus of the protein P73530
S1 ribosomal protein is involved in initiation of translation by recognition and binding of mRNAs through association with the 30S ribosomal subunit. S1 protein is localized in bacterial cytosol.