SFTPD His Tag Protein, Human
SKU: 73479143959

SFTPD His Tag Protein, Human

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Description

SFTPD His Tag Protein, HumanProduct Specification Species Human Synonyms SP D; PSP D; SFTP4; COLEC7 Accession P35247 Amino Acid Sequence Ala21 Phe375, with C terminal His Expression System HEK293 Molecular Weight 37 47kDa (Reducing) Purity 95% by SDS PAGE Endotoxin <0. 1EU g 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

Product Specification


Species Human
Synonyms SP-D; PSP-D; SFTP4; COLEC7
Accession P35247
Amino Acid Sequence Ala21-Phe375, with C-terminal His
Expression System HEK293
Molecular Weight 37-47kDa (Reducing)
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.Kuroki Y, Voelker DR. Pulmonary surfactant proteins. J Biol Chem. 1994; 269:25943–25946.
2.Sano H, Kuroki Y. The lung collectins, SP-A and SP-D, modulate pulmonary innate immunity. Mol Immunol. 2005; 42:279–287.
3.Hu F, Ding G, Zhang Z, Gatto LA, Hawgood S, Poulain FR, et al. Innate immunity of surfactant proteins A and D in urinary tract infection with uropathogenic escherichia coli. J Innate Immun. 2015; 22:9–20.
4.Liu Z, Shi Q, Liu J, Abdel-Razek O, Xu Y, Cooney RN, et al. Innate immune molecule surfactant protein d attenuates sepsis-induced acute pancreatic injury through modulating apoptosis and NF-κB-mediated Inflammation. Sci Rep. 2015; 5:17798.
5.Stahlman MT, Gray ME, Hull WM, Whitsett JA. Immunolocalization of surfactant protein-D (SP-D) in human fetal, newborn, and adult tissues. J Histochem Cytochem. 2002; 50:651–660.

Background

Surfactant Protein D (SP-D, gene name: SFTPD) is a pattern recognition molecule belonging to the family of collections expressed in multiple human organ systems, including the lungs. SFTPD is located at the genomic position 10q22.2‐23.1. In addition to the respiratory system, SFTPD is also expressed in several other tissues/organs, such as the brain, pancreas, kidney, gut, endothelium, and reproductive system. SFTPD was initially identified to be expressed and secreted in lung alveolar epithelial type II cells and plays a crucial role in protecting the lung from inhaled microorganisms, organic antigens, and toxins by recruiting the innate immune system and consequently regulating inflammatory activities. SFTPD is a critical component of the innate immune system intrinsically linked to energy metabolism. SFTPD plays an important role in the innate immune system by binding bacteria, viruses, fungi, and parasites for clearance via opsonization in phagocytes, as well as aiding in the removal of allergens.

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SKU: 73479143959

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Amazon Customer
Charlottesville, US
★★★★★ 5
Sturdy
Color: Bear
Good for dogs that like to chew. Smells like blue raspberry and I was not expecting that
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Reviewed in the United States on June 5, 2026
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Sara Knickmeier
Dallas, US
★★★★★ 5
Must buy!
Color: Grape
My dogs love this and so do I. It really smells like “fun grape” like a fun smelling marker. It’s gentle for their teeth and durable! They are both interested in it and take turns using it, pretty awesome!
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Reviewed in the United States on June 6, 2026
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Staci M. L.
Louisville, US
★★★★★ 5
Great for SuperChewers. Keeps my Golden busy.
Color: Bear, Color: Bear
My dog loves it and it keeps her busy for a while. She actually pulls it out of her toy basket and brings it to me when she wants it filled. I break her treats into some pieces that are easy to get and some a little harder. This way she doesn’t get them too fast or loose interest if they’re harder to get. Also, she’s had it for 3 months and there’s barely a mark on it and she’s still a puppy that chews her toys to pieces.
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Reviewed in the United States on May 5, 2026
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Jen M.
Belleville, US
★★★★★ 5
Durable, cute, & smells so good!
Color: Bear
OMG- didn’t expect this to be my dog’s favorite stuffable dog chew, but it is!! This durable rubber like dog chew is still intact and smells like blueberries after over 2 months! Great for hours with each new treat! Am buying another, when I need to :) great value
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Reviewed in the United States on April 4, 2026
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DZ
Grantham, US
★★★★★ 4
Mostly happy
Color: Grape
Have a 1 1/2 yr old Belgian Malinois who needs things to do. I bought these and he loved it. Bad thing, it took him 1 day to chew the rope off both grape and pineapple. The stems on the cherry were also chewed off. The rest of the toy is intact and he still loves it.
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Reviewed in the United States on May 14, 2026

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