Formalin-fixed, paraffin-embedded human lung stained with Napsin A Recombinant Rabbit Monoclonal Antibody (NAPSA/7043R). Inset: PBS instead of primary antibody, secondary negative control.
SDS-PAGE Analysis Purified Napsin A Mouse Monoclonal Antibody (NAPSA/7043R). Confirmation of Integrity and Purity of Antibody.
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
Napsin is a pepsin-like aspartic proteinase connected with maturation of surfactant protein B.There are two closely related napsins, napsin A and napsin B. Napsin A is expressed as a single chain protein. Immunohistochemical studies revealed high expression levels of napsin A in human lung and kidney but low expression in spleen. Napsin A is expressed in type II pneumocytes and in adenocarcinomas of lung. The high specificity expression of napsin A in adenocarcinomas of lung is useful to distinguish primary lung adenocarcinomas from adenocarcinomas of other organs.