Recombinant Human BACE-1 Protein, CF

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R&D Systems Recombinant Proteins and Enzymes
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Product Details
Citations (7)
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Recombinant Human BACE-1 Protein, CF Summary

Product Specifications

>90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Measured by its ability to cleave a fluorogenic peptide substrate, Mca-SEVNLDAEFRK(Dpn)RR-NH2 (Catalog # ES004). The specific activity is >3.5 pmol/min/µg, as measured under the described conditions.
Mouse myeloma cell line, NS0-derived human BACE-1 protein
Thr22-Tyr460 (pro) & Glu46-Tyr460 (mature), both with a C-terminal 10-His tag
Accession #
N-terminal Sequence
Thr22 & Glu46
Structure / Form
Pro and Mature forms
Predicted Molecular Mass
50 kDa (Pro form) & 47 kDa (Mature form)
68-70 kDa and 65-67 kDa, reducing conditions

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in sterile, deionized water.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -20 to -70 °C as supplied.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Assay Procedure

  • Assay Buffer: 0.1 M Sodium Acetate, pH 4.0
  • Recombinant Human BACE -1 (rhBACE-1) (Catalog # 931-AS)
  • Fluorogenic Peptide Substrate IV: MCA-Ser-Glu-Val-Asn-Leu-Asp-Ala-Glu-Phe-Arg-Lys(DPN)-Arg-Arg-NH2 (Catalog # ES004)
  • F16 Black Maxisorp Plate (Nunc, Catalog # 475515)
  • Fluorescent Plate Reader (Model: SpectraMax Gemini EM by Molecular Devices) or equivalent
  1. Dilute rhBACE-1 to 20 ng/µL in Assay Buffer.
  2. Dilute Substrate to 20 µM in Assay Buffer.
  3. Load 50 µL of rhBACE-1 into a plate and start the reaction by adding 50 µL of 20 µM Substrate. Include a Substrate Blank containing 50 µL Assay Buffer and 50 µL of 20 µM Substrate.
  4. Read at excitation and emission wavelengths of 320 nm and 405 nm (top read), respectively, in kinetic mode for 5 minutes.
  5. Calculate specific activity:

     Specific Activity (pmol/min/µg) =

Adjusted Vmax* (RFU/min) x Conversion Factor** (pmol/RFU)
amount of enzyme (µg)

     *Adjusted for Substrate Blank
     **Derived using calibration standard MCA-Pro-Leu-OH (Bachem, Catalog # M-1975).

Per Well:
  • rhBACE-1: 1 µg
  • Substrate: 10 µM
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: BACE-1

BACE-1 is an aspartic protease and an integral membrane protein (1-5). BACE-1 is the peptidase predominantly responsible for cleavage of the amyloid precursor protein beta site in the brain to generate the amyloid beta peptide. Because the amyloid beta peptide is a major component of amyloid plaques, BACE-1 has been implicated in the onset and/or progression of Alzheimer's disease. BACE-1 is expressed in a variety of human tissues. It is likely that this peptidase has functions in addition to its hydrolysis of the amyloid precursor protein. The peptidase activity of BACE-1 is optimal under mildly acidic conditions (pH 3.5-5.5), consistent with its proposed function in an acidic intracellular compartment.

  1. Ermolieff, J. et al. (2000) Biochemistry 39:12450.
  2. Lin, X. et al. (2000) Proc. Natl. Acad. Sci. USA 97:1456.
  3. Sinha, S. et al. (1999) Nature 402:537.
  4. Vassar, R. et al. (1999) Science 286:735.
  5. Yan, R. et al. (1999) Nature 402:533.
Long Name
beta-site Ayloid Precursor Protein Cleaving Enzyme 1
Entrez Gene IDs
23621 (Human); 23821 (Mouse)
Alternate Names
APP beta-secretase; ASP2; Aspartyl protease 2; BACE1; BACE-1; BACEAsp 2; beta-secretase 1 precursor variant 1; beta-secretase 1; beta-site amyloid beta A4 precursor protein-cleaving enzyme; Beta-site amyloid precursor protein cleaving enzyme 1; Beta-site APP cleaving enzyme 1; beta-site APP-cleaving enzyme 1; beta-site APP-cleaving enzyme; EC 3.4.23; EC; FLJ90568; HSPC104; KIAA1149; memapsin-2; Membrane-associated aspartic protease 2; transmembrane aspartic proteinase Asp2

Citations for Recombinant Human BACE-1 Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

7 Citations: Showing 1 - 7
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  1. Spatiotemporal processing of neural cell adhesion molecules 1 and 2 by BACE1 in vivo
    Authors: W Kim, H Watanabe, S Lomoio, G Tesco
    The Journal of Biological Chemistry, 2021;0(0):100372.
    Species: Mouse
    Sample Types: Tissue Homogenates
    Applications: Bioassay
  2. The botanical origin and antioxidant, anti-BACE1 and antiproliferative properties of bee pollen from different regions of South Korea
    Authors: Y Zou, J Hu, W Huang, L Zhu, M Shao, C Dordoe, YJ Ahn, D Wang, Y Zhao, Y Xiong, X Wang
    BMC Complement Med Ther, 2020;20(1):236.
    Species: Human
    Sample Types:
    Applications: Enzyme Assay
  3. Tissue-Specific Regulation of the Wnt/&beta-Catenin Pathway by PAGE4 Inhibition of Tankyrase
    Authors: S Koirala, J Klein, Y Zheng, NO Glenn, T Eisemann, K Fon Tacer, DJ Miller, O Kulak, M Lu, DB Finkelstei, G Neale, H Tillman, P Vogel, DW Strand, L Lum, CA Brautigam, JM Pascal, WK Clements, PR Potts
    Cell Rep, 2020;32(3):107922.
    Species: Human
    Sample Types: Whole Cells
    Applications: Enzyme Assay
  4. Gleevec shifts APP processing from a ?-cleavage to a nonamyloidogenic cleavage
    Authors: WJ Netzer, K Bettayeb, SC Sinha, M Flajolet, P Greengard, V Bustos
    Proc. Natl. Acad. Sci. U.S.A, 2017;0(0):.
    Species: Human
    Sample Types: Protein
    Applications: Enzyme Assay
  5. Anti-amyloid precursor protein immunoglobulins inhibit amyloid-beta production by steric hindrance.
    Authors: Thomas RS, Liddell JE, Kidd EJ
    FEBS J., 2011;278(1):167-78.
    Species: Human
    Sample Types: Recombinant Protein
    Applications: Enzyme Assay
  6. BACE1 and BACE2 enzymatic activities in Alzheimer's disease.
    Authors: Ahmed RR, Holler CJ, Webb RL
    J. Neurochem., 2010;112(4):1045-53.
    Species: Human
    Sample Types: Recombinant Protein
    Applications: Enzyme Assay
  7. Inhibition of amyloid beta-peptide production by blockage of beta-secretase cleavage site of amyloid precursor protein.
    Authors: Na CH, Jeon SH, Zhang G, Olson GL, Chae CB
    J. Neurochem., 2007;101(6):1583-95.
    Species: Human
    Sample Types: Whole Cells
    Applications: Enzyme Assay


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