Total 139 AA. MW: 16.2 kDa (calculated). UniProtKB acc. no. P05112 (His25–Ser153). N-terminal His-tag (10 extra AA). Protein identity confirmed by LC-MS/MS.
Amino Acid Sequence
Purity as determined by densitometric image analysis: > 95 %
14 % SDS-PAGE separation of Human IL-4:
- M.W. marker – 14, 21, 31, 45, 66, 97 kDa
- Reduced and boiled sample, 2.5 μg/lane
- Non-reduced and non-boiled sample, 2.5 μg/lane
< 0.1 EU/μg
Filtered (0.4 μm) and lyophilized from 0.5 mg/ml solution in 20 mM Tris buffer, 50 mM NaCl, pH 7.5.
Add deionized water to prepare a working stock solution of approximately 0.5 mg/ml and let the lyophilized pellet dissolve completely.
Western blotting, ELISA
At ambient temperature. Upon receipt, store the product at the temperature recommended below.
Store lyophilized protein at –80°C. Lyophilized protein remains stable until the expiry date when stored at –80°C. Aliquot reconstituted protein to avoid repeated freezing/thawing cycles and store at –80°C for long term storage. Reconstituted protein can be stored at 4°C for a week.
Quality Control Test
BCA to determine quantity of the protein.
SDS PAGE to determine purity of the protein.
LAL to determine quantity of endotoxin.
This product is intended for research use only.