In the Normal-Cirrhosis network there are some apparent module structures such as the MHC II complex (major histocompatibility complex, class II), LCK (lymphocyte-specific protein tyrosine kinase) signalling module, chemokine gene module, etc. MHC II molecules are antigen presenting proteins involved in cell-mediated immunity, while LCK is a key regulator of T cell activation and development [38-40]. The gene discussed is LCK; the disease is Cirrhosis.