Alternate Test Names:
Platelet glycoprotein Ib
CD42b, also known as platelet glycoprotein Ib, is a cell surface and transmembrane glycoprotein, expression of which commences somewhat later in megakaryocytic development compared to CD61. CD42b is also expressed by platelets. A subset of cases of Bernard-Soulier syndrome involve congenital deficiency of CD42b.
Subcellular Localization: Membranous
CPT Code(s): 88342 or 88341