ST20 (Suppressor Of Tumorigenicity 20): ST20, also known as MINK1, is a protein belonging to the germinal centre kinase (GCK) family. It participates in key cellular processes such as apoptosis, cytoskeletal reorganisation, and cell migration, and is involved in signalling pathways that regulate cell survival and proliferation. Its role in tumour development and potential as a tumour suppressor remain active areas of research, with important implications for cancer biology and treatment.