SKU: 50294709256

STX4 His Tag Protein, Human

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Description

STX4 His Tag Protein, HumanProduct Specification Species Human Synonyms STX4A, Syntaxin 4 Accession Q12846 Amino Acid Sequence Met1 Leu275, with N terminal 8*His HHHHHHHHMRDRTHELRQGDDSSDEEDKERVALVVHPGTARLGSPDEEFFHKVRTIRQTIVKLGNKVQELEKQQVTILATPLPEESMKQELQNLRDEIKQLGREIRLQLKAIEPQKEEADENYNSVNTRMRKTQHGVLSQQFVELINKCNSMQSEYREKNVERIRRQLKITNAGMVSDEELEQMLDSGQSEVFVSNILKDTQVTRQALNEISARHSEIQQLERSIRELHDIFTFLATEVEMQGEMINRIEKNILSSADYVERGQEHVKTALENQKKARKKKVL Expression System E. coli Molecular

Product Specification


Species Human
Synonyms STX4A, Syntaxin-4
Accession Q12846
Amino Acid Sequence

Met1-Leu275, with N-terminal 8*His HHHHHHHHMRDRTHELRQGDDSSDEEDKERVALVVHPGTARLGSPDEEFFHKVRTIRQTIVKLGNKVQELEKQQVTILATPLPEESMKQELQNLRDEIKQLGREIRLQLKAIEPQKEEADENYNSVNTRMRKTQHGVLSQQFVELINKCNSMQSEYREKNVERIRRQLKITNAGMVSDEELEQMLDSGQSEVFVSNILKDTQVTRQALNEISARHSEIQQLERSIRELHDIFTFLATEVEMQGEMINRIEKNILSSADYVERGQEHVKTALENQKKARKKKVL

Expression System E.coli
Molecular Weight 33kDa
Purity >95% by SDS-PAGE
Endotoxin <0.1EU/μg
Conjugation Unconjugated
Tag His Tag
Physical Appearance Lyophilized Powder
Storage Buffer PBS, pH7.4
Reconstitution Reconstitute at 0.1-1 mg/ml according to the size in ultrapure water after rapid centrifugation.
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. Biochem Biophys Res Commun. 2013 Oct 11;440(1):163-7.

Background

Syntaxin-4, a member of the Qa sensitive factor attachment protein receptor (SNARE) syntaxin family has been implicated in fusion events at the plasma membrane in a number of cells in the immune system. This protein enables sphingomyelin phosphodiesterase activator activity, and is active in glutamatergic synapse and postsynapse. Study demonstrates that syntaxin-4 plays a critical role in the secretion of IgE from plasma cells and sheds some light on the mechanisms by which these cells constitutively traffic vesicles to the surface for secretion. Together with STXB3 and VAMP2, it may also play a role in docking/fusion of intracellular GLUT4-containing vesicles with the cell surface in adipocytes and in docking of synaptic vesicles at presynaptic active zones (By similarity).

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SKU: 50294709256

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4.2 ★★★★★
Based on 19 reviews
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Sammie Jo
San Leandro, US
★★★★★ 5
Almost tastes like chocolate milk!
Flavor Name: Chocolate, Size: 11.5 Fl Oz (Pack of 12)
I usually dislike protein drinks. But I need It, and this one actually almost tastes like chocolate milk. I’ve tried the other flavors of this brand, and for me, this is the least protein tasting one. Banana came close.
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Reviewed in the United States on May 13, 2026
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Abhigna Kajiwala
Bozeman, US
★★★★★ 5
The Gold Standard: Premier Protein Chocolate Shake
Flavor Name: Chocolate, Size: 11.5 Fl Oz (Pack of 12)
The Premier Protein Chocolate Shake is, in my opinion, the benchmark for ready-to-drink protein shakes. Whether you're a serious athlete, a busy professional, or someone trying to hit daily protein goals, this shake delivers on taste, convenience, and macros. Taste & Texture (Surprisingly Good) Let's be honest: most shelf-stable protein shakes taste like chalky chemicals. This is where Premier Protein shines. The Chocolate flavor is rich, creamy, and surprisingly satisfying without being overly sweet. It tastes like a genuine, albeit light, chocolate milk. Crucially, the texture is smooth and velvety; there is virtually no grittiness or unpleasant artificial aftertaste. I genuinely look forward to drinking these, which is half the battle with supplements. They are best enjoyed ice-cold! Unbeatable Nutritional Profile The macros are what make this shake truly exceptional: 30g of High-Quality Protein: Perfect for post-workout recovery, satisfying hunger between meals, or boosting the protein content of coffee/recipes. 1g Sugar & 5g Carbs: This low-carb, low-sugar profile makes it ideal for nearly any diet, including keto and low-glycemic plans. 160 Calories: A great way to add significant protein without excessive calories. Verdict & Best Uses I always keep a case of these shakes stocked. They are a true time-saver for fast breakfast additions, quick muscle fuel after the gym, or a guilt-free late-night snack. If you are struggling to find a convenient, affordable, and high-protein option that actually tastes good, look no further. This product is a staple.
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Reviewed in the United States on December 3, 2025
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Verified Purchase
diane west
San Leandro, US
★★★★★ 5
An easy way to add protein to your diet
Flavor Name: Chocolate, Size: 11.5 Fl Oz (Pack of 12)
A nice way to add more protein to my diet. The taste in the texture are always the same. I like that it doesn’t change.
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Reviewed in the United States on May 7, 2026
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Nicole W
Alexandria, US
★★★★★ 5
Perfect meal replacement protein shake
Flavor Name: Chocolate, Size: 11.5 Fl Oz (Pack of 12)
These shakes are super rich in chocolatey flavor. They are the perfect meal replacement or on the go protein. The quality is great and they are super refreshing. I recommend to drink them cold. They are way better.
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Reviewed in the United States on May 13, 2026
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Anna
Natrona Heights, US
★★★★★ 4
Good protein option with good taste
Flavor Name: Chocolate, Size: 11.5 Fl Oz (Pack of 12)
These shakes are delicious. There are a few things about them I love. First, they are gluten-free. Next, they are low in sugar. They are also low in calories, and are very tasty. They do not leave an aftertaste like a lot of protein shakes. I do find you need to really shake them well to get a good consistency. They are not clumpy, but sometimes have strands that give them a weird texture. However, this does not happen if you shake them really well. I like to blend mine with fruit, and never have this problem when I do that. They are also really convenient because you can grab them and go. The serving size is perfect too. I would recommend these if you are looking for a low sugar, protein drink.
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Reviewed in the United States on February 26, 2026

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