LEI (Leukocyte Elastase Inhibitor, SERPINB1, EI, ELANH2, LEI, M/NEI, MNEI, PI2, Serpin Peptidase Inhibitor Clade B Member 1, Elastase, Monocyte/Neutrophil Elastase Inhibitor)

Antibodies / Antibodies-Protease Inhibitors

-20°C

Supplied as a liquid in PBS, pH 7.4, 0.02% sodium azide, 50% glycerol.

Recombinant protein corresponding to His17-Glu332 of rat LEI fused to His-Tag and T7-tag at N-terminal expressed in E. coli.

Monocyte/neutrophil elastase inhibitor (EI) is a protein of approximately 42, 000 Mr with serpin-like functional properties. Remold-O'Donnell et al. (1992) cloned EI cDNA and identified 3 EI mRNA species of 1.5, 1.9, and 2.6kb in monocyte-like cells and no hybridizing mRNA in lymphoblastoid cells lacking detectable EI enzymatic activity. The cDNA open reading frame encoded a 379aa protein. Its sequence established EI as a member of the serpin superfamily. Sequence alignment indicated that the reactive center P1 residue is cys-344, consistent with abrogation of elastase inhibitory activity by iodoacetamide and making EI a naturally occurring cys-serpin. Other elastase inhibitors include alpha-1-antitrypsin (PI) and secretory leukocyte protease inhibitor (SLPI).

Applications:
Suitable for use in ELISA, Western Blot, Immunohistochemistry, Immunocytochemistry. Other applications not tested.

Recommended Dilution:
ELISA: 1:100-5000
Western Blot: 1:50-400
Immunohistochemistry (frozen): 1:50-500
Immunohistochemistry (paraffin): 1:10-100
Immunocytochemistry: 1:50-500
Optimal dilutions to be determined by the researcher.

Storage and Stability:
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.