RPS9 and osteosarcoma: In response to stress, uS3/RPS3, uS4/RPS9, uS17/RPS11, eS24/RPS24, eL6/RPL6, uL13/RPL13A, eL14/RPL14, eL30/RPL30, eL42L/RPL36AL, and RACK1 in U2OS (human osteosarcoma) cells have O-linked β-N-acetylglucosamine (O-GlcNAc) modifications [51].