CLPTM1 (Cleft Lip and Palate Transmembrane Protein 1): CLPTM1 is a transmembrane protein involved in key cellular processes such as cell proliferation, apoptosis, and carcinogenesis. While its exact function is not yet fully understood, research suggests a potential role in cancer development and progression. CLPTM1 expression has been linked to several cancers, including lung, pancreatic, and ovarian cancers, where it may contribute to tumour growth and metastasis. It is also associated with smoking-related cancers due to its interaction with tobacco-related carcinogens. Understanding the molecular mechanisms of CLPTM1 could provide valuable insights into cancer biology and therapeutic approaches.