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  4. CD4 Protein, Human (HEK293, Fc)

CD4 Protein, Human (HEK293, Fc)

Cat. No.: HY-P72902
Handling Instructions

The CD4 protein is an integral membrane glycoprotein that plays a key role in immune responses. In T cells, it serves as a coreceptor for MHC class II molecules, interacting with T cell receptors and initiating intracellular signaling pathways. CD4 Protein, Human (HEK293, Fc) is the recombinant human-derived CD4 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of CD4 Protein, Human (HEK293, Fc) is 365 a.a., with molecular weight of ~67.4 kDa.

For research use only. We do not sell to patients.

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Description

The CD4 protein is an integral membrane glycoprotein that plays a key role in immune responses. In T cells, it serves as a coreceptor for MHC class II molecules, interacting with T cell receptors and initiating intracellular signaling pathways. CD4 Protein, Human (HEK293, Fc) is the recombinant human-derived CD4 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of CD4 Protein, Human (HEK293, Fc) is 365 a.a., with molecular weight of ~67.4 kDa.

Background

The CD4 protein, an integral membrane glycoprotein, assumes a crucial role in immune responses, undertaking diverse functions against both external and internal challenges. In T-cells, its primary function is as a coreceptor for the MHC class II molecule:peptide complex, where class II peptides originate from extracellular proteins, while class I peptides are derived from cytosolic proteins. CD4 interacts concurrently with the T-cell receptor (TCR) and the MHC class II presented by antigen-presenting cells (APCs), leading to the recruitment of the Src kinase LCK to the vicinity of the TCR-CD3 complex. Subsequently, LCK initiates various intracellular signaling pathways by phosphorylating diverse substrates, ultimately resulting in lymphokine production, enhanced motility, adhesion, and the activation of T-helper cells. In other cell types such as macrophages or NK cells, CD4 contributes to differentiation/activation, cytokine expression, and cell migration through a TCR/LCK-independent pathway. Additionally, it plays a pivotal role in the development of T-helper cells in the thymus and triggers the differentiation of monocytes into functional mature macrophages. Notably, CD4 acts as the primary receptor for human immunodeficiency virus-1 (HIV-1), with its down-regulation facilitated by HIV-1 Vpu, and it also serves as a receptor for Human Herpes virus 7/HHV-7.

Species

Human

Source

HEK293

Tag

C-hFc

Accession

P01730 (K26-W390)

Gene ID

920  [NCBI]

Synonyms
T-cell surface glycoprotein CD4; T-cell surface antigen T4/Leu-3; CD4
AA Sequence

KKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTKGPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTCTVLQNQKKVEFKIDIVVLAFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWWQAERASSSKSWITFDLKNKEVSVKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLALEAKTGKLHQEVNLVVMRATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWVLNPEAGMWQCLLSDSGQVLLESNIKVLPTW

Molecular Weight

Approximately 67.4 kDa

Purity

Greater than 95% as determined by reducing SDS-PAGE.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Documentation

CD4 Protein, Human (HEK293, Fc) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

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The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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CD4 Protein, Human (HEK293, Fc)
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HY-P72902
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