CA242, or Cancer Antigen 242, is a notable glycoprotein biomarker within the realm of oncology and the biomedical industry. It is classified as a mucin, a type of glycoprotein characterized by extensive glycosylation and an often elongated structure. CA242 is composed of a unique amino acid sequence, primarily consisting of tandem repeats rich in proline, threonine, and serine residues. These repeats contribute to its mucinous and glycosylated nature, facilitating its distinctive role in various types of cancer.
The amino acid sequence of CA242, which varies slightly between individuals, comprises a central core protein with extensive glycosylation sites. The glycosylation of CA242 involves the addition of carbohydrate molecules, particularly O-linked glycans, enhancing its stability and modulating its functions. The specific amino acid sequence and glycosylation pattern are critical factors in the structural integrity and functionality of CA242, making it an important target for detection and analysis in cancer diagnostics.