protein

CD4 Protein, Human (HEK293, Fc)

HY-P72902

5 μg;10 μg;50 μg;100 μg;500 μg;1 mg

40;65;180;290;870;1400 USD

CD4 Protein, Human (HEK293, Fc)

proteins

HEK293

5 μg;10 μg;50 μg;100 μg;500 μg;1 mg

40;65;180;290;870;1400 USD

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.

Human

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.

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

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

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4, 8% trehalose.

Room temperature in continental US; may vary elsewhere.