Transmission Electron Microscopy: TEM cryo-immunnohistochemistry of a frozen thin section of human lung using anti HT1-56 to visulize the apical surface of type 1 cells (both upper panels) and HT2-280 localized to the apical surface of type 2 cells (bottom panel). 

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Differential Cell Staining: Mixed alveolar epithelial   cells isolated from an injured human lung specimen, cultured for 5 days on fibronectin coated plastic promoting the type 1 cell phenotype, and differentially stained with anti HT1-56 (green) and anti HT2-280 (red). Type 1 cells are stained green, attenuated type 2 cells are red, and transitional dual staining cells are yellow. 

Immunohistochemistry: Human type 1 cells isolated using anti HT1-56 and cultured on 'fibronectin coated' plastic for 5 days forming a contact inhibited cell monolayer (in red), and rat type 1 cells isolated using anti RT1-40 and similarly cultured for 6 days (in green). 

Our antibodies, specific within the human lung to alveolar epithelial type 1 or type 2 cells, are validated and effective for:


            - Immunohistochemistry


            - Western Blotting


             - Cell Isolation by FACS


             - Semi-Quantitative Dot Blots


             - Magnetic Cell Sorting


             - TEM Cryo-Immunohistochemistry         






Human lung alveolar type 2 cell labeled with antibody to HT2-280 with bound gold nanospheres.  0.1micron:        


Providing validated antibodies for innovative research.

Terrace Biotech


Examples of Possible Applications of Anti HT1-56 and Anti HT2-280 to

Advance Your Research.

Immunohistochemistry: Anti HT1-56 and anti HT2-280 used in conjunction to differentially illuminate alveolar type 1 cells (red) and type 2 cells (green) in a paraformaldehyde fixed thin section of a human lung specimen.

Cell Isolation by FACS: Immunofluorescence image of FACS isolated human type 1 and type 2 cells showing high purity for each differentially stained population. (A) HT1-56 positive cells (red), DAPI stained nuclei (blue). (C) HT2-280 positive cells (green). (B & D) Accompanying phase contrast images for A and C.   



Western Blotting: Western Blots of whole lung homgenate run on a (A) 7% SDS-PAGE gel run under reducing conditions, transfered onto nitrocellulose, and probed using anti HT2-280, or (B) homogenate run on a 10% SDS-PAGE gel run under non-reducing conditions, and probed using anti HT1-56.   

Semi-Quantitative Dot Blot: Anti HT1-56 used in a semi-quantitative dot blot to detect HT1-56 in human lung homogenate and lung aspirates from three different diseased lungs. 


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Terrace Biotech's expertise arose from the Pulmonary Research Group at UCSF Medical Center that helped characterize pulmonary surfactant and then developed a synthetic form of it that is used to treat premature infants with respiratory distress syndrome. With over twenty-five years of 'hands on' research experience in lung cell biology, Terrace Biotech applies its expertise to further innovation in medical research and improve human health.