SKU: 10720946152

Human CD45, His tag

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Description

Human CD45, His tagProduct Specification Species Human Synonyms Leukocyte common antigen (L CA), T200, CD45 Accession P08575 Amino Acid Sequence Protein sequence (P08575, Gln26 Gly100, with C 10*His) QSPTPSPTGLTTAKMPSVPLSSDPLPTHTTAFSPASTFERENDFSETTTSLSPDNTSTQVSPDSLDNASAFNTTGGGGGSHHHHHHHHHH Expression System HEK293 Molecular Weight Predicted MW: 9. 5 kDa Observed MW: 55 72 kDa Purity 95% by SDS PAGE Endotoxin <1EU g Tag with C 10*His Physical Appearance Lyophilized

Product Specification


Species Human
Synonyms Leukocyte common antigen (L-CA), T200, CD45
Accession P08575
Amino Acid Sequence

Protein sequence (P08575, Gln26-Gly100, with C-10*His) QSPTPSPTGLTTAKMPSVPLSSDPLPTHTTAFSPASTFERENDFSETTTSLSPDNTSTQVSPDSLDNASAFNTTGGGGGSHHHHHHHHHH

Expression System HEK293
Molecular Weight Predicted MW: 9.5 kDa Observed MW: 55-72 kDa
Purity >95% by SDS-PAGE
Endotoxin <1EU/μg
Tag with C-10*His
Physical Appearance Lyophilized Powder
Storage Buffer Lyophilized from a 0.2 μm filtered solution of 0.2M PBS, pH7.4.
Reconstitution Reconstitute no more than 1 mg/mL according to the size in deionized water after rapid centrifugation.
Stability & Storage

12 months from date of receipt, -20 to -70 °C as supplied. 6 months, -20 to -70 °C under sterile conditions after reconstitution. 1 week, 2 to 8 °C under sterile conditions after reconstitution. Please avoid repeated freeze-thaw cycles.

Background

CD45 is a member of the protein tyrosine phosphatase (PTP) family. CD45 contains an extracellular domain, a single transmembrane segment, and two tandem intracytoplasmic catalytic domains, and thus belongs to the receptor type PTP family. CD45 is a type I transmembrane protein that is present in various isoforms on all differentiated hematopoietic cells (except erythrocytes and plasma cells). CD45 has been shown to be an essential regulator of T- and B-cell antigen receptor signalling. It functions through either direct interaction with components of the antigen receptor complexes via its extracellular domain (a form of co-stimulation), or by activating various Src family kinases required for the antigen receptor signaling via its cytoplasmic domain. CD45 also suppresses JAK kinases, and so functions as a negative regulator of cytokine receptor signaling. CD45 does not colocalize with lipid rafts on murine and human non-transformed hematopoietic cells, but CD45 positioning within lipid rafts is modified during their oncogenic transformation to acute myeloid leukemia. CD45 colocalizes with lipid rafts on AML cells, which contributes to elevated GM-CSF signal intensity involved in proliferation of leukemic cells.

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SKU: 10720946152

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4.7 ★★★★★
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Michelle B. Govertsen
Charlottesville, US
★★★★★ 4
Helps my moisturizer absorb better
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I’m not quite sure if the product is fully working the way it is supposed to but I do like that when I use this and the apply moisturizer, it absorbs into my skin better and leaves my skin smoother and a lot less greasy. It’s easy to throw in my travel bag because of the size and you really only just need a little for each use so it goes a long way got the cost.
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Reviewed in the United States on May 31, 2026
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Raschell
Bozeman, US
★★★★★ 5
Amazing!
Color: Cyano Pink Spicule
This makes my skin feel so smooth. The appearance of my skin also is starting to look a lot better/younger. I've been using it for a week and a half already seeing changes.
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Reviewed in the United States on May 11, 2026
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Holly K.
New York, US
★★★★★ 3
Brightens, doesn't firm
Color: Cyano Pink Spicule
I've been using this for about a month now, every night on my face and neck, hoping to reduce the appearance of wrinkles and tighten some of my skin in that area that seems to be losing elasticity. On my neck, I've honestly noticed no real difference in 4 weeks of continued, consistent daily use. The skin on my face does seem brighter and somewhat less textured than before, but I haven't noticed any change in the issues I was hoping this would resolve, based on the claims and how it was marketed. So... not a bad addition to my skincare, but not the solution I was looking for. Some have expressed concerns about it tingling or stinging... You can feel something when you apply it, it's almost like the feeling of static electricity, but it's very mild. I wouldn't let that stop you from giving it a try if you were concerned about it. It didn't cause my sensitive skin any breakouts or redness (although I was applying it at night before bed, so perhaps any redness was calmed overnight). I'm going to go ahead and finish the bottle, but based on these results, I probably won't repurchase.
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Reviewed in the United States on May 3, 2026
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arnie
Houston, US
★★★★★ 4
Decent Product
Color: Cyano Pink Spicule
Not bad for the $ , it makes my skin feel good.
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Reviewed in the United States on May 24, 2026
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Noelle
Belleville, US
★★★★★ 5
Helped Tighten My Skin & Minimize Pores
Color: Cyano Pink Spicule, Color: Cyano Pink Spicule
I’ve loved the Dr. Melaxin Cyano Pink Spicule Serum! The bottle is small, but it lasted me around 6 months since I only use one pump every other night. When I first started using it, I noticed a tingling sensation, but over time my skin adjusted and I barely notice it now. I’ve definitely seen my pores appear smaller and my skin feels tighter and smoother after using it.
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Reviewed in the United States on May 26, 2026

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