SKU: 55727975384

PE-Labeled CD19 His Tag Protein, Human

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Description

PE-Labeled CD19 His Tag Protein, HumanProduct Specification Species Human Synonyms CD19,B4,CVID3,MGC12802 Accession P15391 1 Amino Acid Sequence Pro 20 Lys 291 with His Tag at C Terminus Expression System HEK293 Molecular Weight 40 45kDa (Reducing) Conjugation PE Tag His Tag Physical Appearance Liquid Storage Buffer PBS 0. 5%BSA pH7. 4 Stability & Storage 12 months from date of receipt, lyophilized powder stored at 20 to 80. 3 months, 20 to 80 under sterile conditions after

Product Specification


Species Human
Synonyms CD19,B4,CVID3,MGC12802
Accession P15391-1
Amino Acid Sequence

Pro 20-Lys 291 with His Tag at C-Terminus
Expression System HEK293
Molecular Weight 40-45kDa (Reducing)
Conjugation PE
Tag His Tag
Physical Appearance Liquid
Storage Buffer

PBS 0.5%BSA pH7.4
Stability & Storage

· 12 months from date of receipt, lyophilized powder stored at -20 to -80℃. 
· 3 months, -20 to -80℃ under sterile conditions after reconstitution.
· 1 week, 2 to 8℃ under sterile conditions after reconstitution.  
· Please avoid repeated freeze-thaw cycles.
Reference

1.Wang SY, An WH, Wang ZS, Wang WL, Zhang B, Xu KL, Guo SL, Gao M, Li B, Huang L, Tian HH, Guo WY, Wang HR. Incidentally cured psoriasis in a patient with refractory/relapsed diffuse large B-cell lymphoma receiving CD19 CAR-T cell therapy: a case report. Front Immunol. 2024 Oct 24; 15: 1418768.

Background

CD19, also known as B-lymphocyte antigen or Cluster of Differentiation 19, is a single-pass type I membrane protein that contains two Ig-like C2-type (immunoglobulin-like) domains. It is expressed on follicular dendritic cells and B cells, being present from the earliest recognizable B-lineage cells during development to B-cell blasts, but is lost upon maturation to plasma cells. CD19 primarily functions as a B cell co-receptor in conjunction with CD21 and CD81. Upon activation, the cytoplasmic tail of CD19 becomes phosphorylated, leading to binding by Src-family kinases and recruitment of PI-3 kinase. Mutations in the CD19 gene are associated with severe immunodeficiency syndromes, characterized by diminished antibody production. CD19 has been shown to interact with CD81, CD82, Complement receptor 2, and VAV2.

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Exchange/Return Notes
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SKU: 55727975384

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4.2 ★★★★★
Based on 28 reviews
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Product Reviews
M
Verified Purchase
Miriam Avila Sanchez
Phoenix, US
★★★★★ 5
Needed for Sunday School
Color: Grey, Size: Wheel-6 Panel
This was purchase to divide two Sunday school children classes. It works wonderful, big enough, sturdy and with wheels, so is easy to move. Thanks God we can find everything in amazon.com. Delivery was fast and perfect. Thank you .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2024
M
Verified Purchase
Melissa P
Lake Worth, US
★★★★★ 3
Not as tall as anticipated
Color: Black, Size: Wheel-6 Panel
Definitely not 6 feet tall, more like 5 1/2. Very sturdy and the fabric is thick. Works well for what we're using it for.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2025
V
Verified Purchase
Vickie Dovel
Draper, US
★★★★★ 5
Easy to put together
Color: Grey, Size: Wheel-6 Panel
Love them
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Reviewed in the United States on December 17, 2025
A
Amazon Customer
Omaha, US
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well. Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely. One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs. The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers. Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster. Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality. Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
F
Fred
Massapequa, US
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one. The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy. Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex. The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one. The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026

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