Lonza's Human Small Airway Epithelial Cells (SAEC) are isolated from normal human lung tissue the distal portion of the lung in the 1mm bronchiole area.Cryopreserved SAECs or Alveolar Cells are guaranteed through 15 population doublings and stain positive for cytokeratin 19.SAECs or Alveolar Cells labeled CC-2547S are suitable for air-liquid interface studies and are guaranteed for differentiation marked by cilia formation, mucin production, and TEER levels. Cells from various diseased donors are also available. Benefits:All cells test negative for mycoplasma, bacteria, yeast, and fungiHIV-1, Hepatitis B and Hepatitis C are not detected for all donors and/or cell lotsCertificate of Analysis provided for every cell lot Content:1 x Cryopreserved ampule SAEC containing ≥500,000 cells