膜杰作
Star Staining
分子别名（Synonym）
Activin A,INHBA
表达区间及表达系统（Source）
Human Activin A Protein, premium grade (ACA-H5314) is expressed from CHO cells. It contains AA Gly 311 - Ser 426 (Accession # P08476).
Predicted N-terminus: Gly 311
It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage. When ready to transition into later clinical phases, we also offer a custom GMP protein service that tailors to your needs. We will work with you to customize and develop a GMP-grade product in accordance with your requests that also meets the requirements for raw and ancillary materials use in cell manufacturing of cell-based therapies.
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries no "tag".
The protein has a calculated MW of 13.0 kDa. The protein migrates as 13 kDa±3 kDa under reducing (R) condition, and 24 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 0.01 EU per μg by the LAL method.
宿主蛋白残留（Host Cell Protein）
<0.5 ng/µg of protein tested by ELISA.
宿主核酸残留（Host Cell DNA）
<0.02 ng/μg of protein tested by qPCR.
无菌（Sterility）
Negative
支原体（Mycoplasma）
Negative.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（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.
存储（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 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Human Activin A Protein, premium grade on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).
活性（Bioactivity）-Bioactivity CELL BASE
Human Activin A Protein, premium grade (Cat. No. ACA-H5314) stimulates Human Activin RIl (Luc) HEK293 Reporter Cell. The specific activity of Human Activin A Protein, premium grade is＞5.00 x 10^2 IU/mg, which is calibrated against WHO Reference Reagent Activin A (Human, Recombinant) NIBSC code: 91/626 (QC tested).
Protocol
活性（Bioactivity）-ELISA
Immobilized Human Activin A Protein, premium grade (Cat. No. ACA-H5314) at 5 μg/mL (100 μL/well) can bind Biotinylated Human Activin RIIB Protein, His,Avitag (Cat. No. ACB-H82E3) with a linear range of 0.2-2 ng/mL (QC tested).
Protocol
Immobilized Human Activin A Protein, premium grade (Cat. No. ACA-H5314) at 5 μg/mL (100 μL/well) can bind Human ACVR2A, Fc Tag (Cat. No. ACA-H5269) with a linear range of 0.6-20 ng/mL (Routinely tested).
Protocol
应用数据（Application Data）
Human Activin A Protein, premium grade (Cat. No. ACA-H5314) could effectively induce the hiPSC to endoderm differentiation by FOXA2 expression in immunofluorescence and FACS.
背景（Background）
Activin and inhibin are two closely related protein complexes that have almost directly opposite biological effects. Activin enhances FSH biosynthesis and secretion, and participates in the regulation of the menstrual cycle. Many other functions have been found to be exerted by activin, including roles in cell proliferation, differentiation, apoptosis, metabolism, homeostasis, immune response, wound repair, and endocrine function. Conversely inhibin down regulates FSH synthesis and inhibits FSH secretion.Activins are nonglycosylated homodimers or heterodimers of various β subunits (βA, βB, βC, and βE in mammals), while Inhibins are heterodimers of a unique α subunit and one of the β subunits. Activin A is a widely expressed homodimer of two βA chains. The βA subunit can also heterodimerize with a βB or βC subunit to form Activin AB and Activin AC, respectively. The 14 kDa mature human βA chain shares 100% amino acid sequence identity with bovine, feline, mouse, porcine, and rat βA.
