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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 (reference only; CPTs may vary)
Turnaround Time: Within 1-2 business days of receipt
Schedule: Monday - Friday
• Formalin-fixed, paraffin-embedded (FFPE) tissue block or cell block - OR -
• 1 unstained slide for each test requested plus 3-4 additional unstained slides cut at 4µm