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Product Details
Product Details
Laminin 421, predominantly found in vascular and dynamic tissue niches, plays a critical role in guiding stem cell differentiation towards specific lineages, particularly endothelial and pancreatic cells. Its expression provides key signals that help establish the functional characteristics of these cell types. During the differentiation of pluripotent stem cells (iPSCs/ESCs) into endothelial cells (the building blocks of blood vessels), LN421 in the microenvironment promotes the proliferation and assembly of endothelial progenitors, directly supporting vascular tissue formation. Similarly, in the context of pancreatic differentiation, LN421 is a natural component of the pancreatic epithelium basement membrane. Its presence is crucial for the efficient generation of insulin-producing pancreatic beta cells from stem cells, as it interacts with specific integrin receptors to promote the survival and functional maturation of these precious cell types, holding significant promise for diabetes research and cell therapy.
Expression System
HEK293
Key Parameter
Purity (SDS PAGE)> 90%Mycoplasma TestNegativeSterility TestNegativeEndotoxin Test<0.05 EU per μgHost Cell Protein<0.5 ng/µgFormulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
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Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 24 months in lyophilized state;
- -70°C for 12 months under sterile conditions after reconstitution.
ACRO Quality Management System
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Performance Data
Bioactivity-SPR
Human Laminin 421 Protein, premium grade (Cat. No. LA4-H5218) immobilized on CM5 Chip can bind Human ITGA6&ITGB1 Heterodimer Protein, His Tag&Tag Free (Cat. No. IT1-H52W7) with an affinity constant of 8.25 nM as determined in a SPR assay (Biacore 8K) (QC tested).
Protocol
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FAQ
- product
Can lyophilized proteins remain stable during room-temperature shipping or temporary room-temperature exposure?
In general, lyophilized proteins remain stable during room-temperature shipping or temporary exposure to room-temperature conditions.
Many ACROBiosystems recombinant proteins are supplied in lyophilized (freeze-dried) form. The lyophilization process effectively removes moisture from the product, helping reduce degradation-related reactions and improve protein stability during transportation and storage.
To evaluate the stability of lyophilized proteins under normal temperature conditions, ACROBiosystems conducted a stability study on 11 representative lyophilized protein products at 37°C. The study demonstrated that these proteins maintained good quality stability after storage at 37°C for approximately 20 days. Based on these validation results, temporary room-temperature exposure during shipping or handling is generally not expected to have a significant impact on product quality or downstream application performance.
To ensure optimal long-term stability, products should be stored according to the storage conditions specified in the product Certificate of Analysis (COA) upon receipt.
Supporting Document
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