scispace - formally typeset
Search or ask a question

Do vital proteins collagen peptides contain sulfites? 

Answers from top 3 papers

More filters
Papers (3)Insight
This absence of sulfhydryl group reactivity did not appear to result from disulfide-binding between Type III collagen and noncollagenous peptides.
The present results demonstrated that collagen peptides can be utilised for developing high value-added ingredients, for example ACE inhibitory peptides.
The topics may serve as a guide for the design of collagen-like peptides and their bioconjugates for targeted application in the biomedical arena.

See what other people are reading

Why is staudinger ligation and transition metal catalysis less used in bioorthogonal drug delivery?
4 answers
Staudinger ligation and transition metal catalysis are less used in bioorthogonal drug delivery due to challenges such as incomplete biocompatibility, slow kinetics, and limitations in biological media. While Staudinger ligation set a new paradigm for bioconjugation strategies, its incomplete biocompatibility hinders its widespread application. Transition metals, although versatile, face challenges in hostile biological environments, necessitating coordinating enzymes or stabilizing structures for in vivo use. Additionally, the slow kinetics and incomplete biocompatibility of these methods have led to the advancement of faster and more biocompatible bioorthogonal reactions like the inverse-electron demand Diels-Alder reaction, which offers ideal kinetics and biocompatibility for drug delivery applications. These limitations highlight the need for more efficient and biocompatible bioorthogonal reactions in drug delivery systems.
What are the chemical reactions involved in the conversion of polyvinylscetate to polyvinylalcohol?
5 answers
The conversion of polyvinyl acetate to polyvinyl alcohol involves several chemical reactions. Initially, polyvinyl acetate is polymerized from vinyl acetate using an organic peroxide initiator and a sulfur-containing acid ester compound as a chain transfer agent. Subsequently, the polymer undergoes alcoholysis treatment to yield polyvinyl alcohol. This process ensures a narrow molecular weight distribution in both the polymer and the resulting polyvinyl alcohol. Additionally, the use of an organic peroxide initiator facilitates simultaneous chain growth in multiple directions, leading to a high degree of polymerization in the polyvinyl alcohol. The overall reaction scheme involves controlled polymerization and alcoholysis steps, resulting in the transformation of polyvinyl acetate into polyvinyl alcohol with specific molecular characteristics.
How does the chemical composition of paper change over time when exposed to different levels of light and humidity?
5 answers
The chemical composition of paper undergoes significant changes over time when exposed to varying levels of light and humidity. Exposure to ultraviolet radiation leads to the degradation of paper, causing yellowing, increased acidity, and mechanical strength loss. Additionally, fluctuations in relative humidity impact paper degradation, with rapid changes leading to damage such as cellulose depolymerization and strength loss. Furthermore, exposure to volatile organic compounds (VOCs) like acetic acid and hexanaldehyde accelerates cellulose degradation, affecting properties such as tensile strength and viscosity. High lignin content in paper can suppress certain cellulose degradation pathways, highlighting the role of atmospheric humidity in altering cellulose chain lengths and structure. Overall, light and humidity play crucial roles in the chemical deterioration of paper, affecting its optical, physical, and mechanical properties over time.
How many amino acid residues does type 1 collagen have?
4 answers
Type I collagen, the primary substrate for the tanning industry, is comprised of two al(I) and one a2(I) chains containing more than 3000 amino acid residues.
What are the legal issues of using methanol carbonylation for acetic acid productionion?
4 answers
Methanol carbonylation for acetic acid production has been a topic of interest for decades. The key issue is the inhibiting effect of water produced by methanol dehydration, which reduces the selectivity of methyl acetate (MA) and acetic acid. CuCeOx/H-mordenite (H-MOR) catalyst has been developed to eliminate the inhibiting effect of water by a water-gas shift reaction (WGSR) on-site, achieving high methanol conversion and MA selectivity. Another method involves merging the liquid phase and top gas phase in a reaction kettle and sending it to a flash tower for flashing, which simplifies the process and reduces equipment investment. Homogeneous methanol carbonylation suffers from difficult separation and metal leaching, while heterogeneous catalytic processes are being developed to address these issues. The development of improved catalysts and catalysis processes for carbonylation is ongoing, including the use of metal-complex catalysts and rhodium complex-anchored heterogeneous catalysts.
What are the nano fosiles?
4 answers
Nano fossils are described in the abstracts provided. The abstract by Aceñolaza and Buatois discusses trace fossils from the Upper Paleozoic of Argentina, including various ichnofossils such as Ancorichnus, Beaconichnus, and Didymaulichnus. These trace fossils provide information about the paleoenvironment and stratigraphic range of the fossils, as well as their preservation and origin. The abstract by Tejeda Villagómez et al. mentions the use of silicon nanoparticles (SiNPs) in agriculture, highlighting their biocompatibility and stability, as well as their ability to anchor molecules on their surface. The abstract by Jaramillo et al. discusses the synthesis of silica nanoparticles for disease detection and treatment, specifically through drug encapsulation. The abstract by Rademacher and Williams describes nanoparticles for immune responses against infectious agents, utilizing a core linked to various ligands. The abstract by Martinez describes Mycrothyriales fungi found in fossil state in Argentina, including new species and the oldest representatives of the Mycrothyriales.
How does amber light impact on bone?
5 answers
Amber light has been found to impact bone in different ways. One study found that the photoisomerization of a perfluorinated azobenzene derivative with amber light led to a modulation of the secondary structure of a helical peptide, changing it from disorganized to an amphiphilic helical structure. Another study suggested that the effect of light on bone is primarily heating, which can be difficult to distinguish from photoconductivity. However, a different study observed a photovoltaic effect in bone and its major components, collagen and apatite, in response to infrared and visible light, with a decrease in photovoltage after exposure to ultraviolet light. Additionally, LED phototherapy using infrared light was found to improve the deposition of hydroxyapatite on bone defects in rats with osteoporosis. Overall, the impact of amber light on bone appears to involve changes in secondary structure, heating effects, and photovoltaic responses, but further research is needed to fully understand the mechanisms involved.
What are the target protein for pancreatitis to perform docking?
5 answers
The target proteins for pancreatitis to perform docking are pancreatic lipase related protein 1 (PLRP1), arachidonate 5-lipoxygenase (ALOX5), human pancreatic trypsin (hPT), and focal adhesion kinase 1 (FAK1).
What are some examples of applications of quantum dots in the medical field?
5 answers
Quantum dots (QDs) have various applications in the medical field. They can be used in bio-imaging, drug research, drug delivery, immune assays, biosensors, gene therapy, diagnostics, and targeted drug delivery. QDs have unique physicochemical features such as broad absorption spectra, narrow emission spectra, and high brightness, making them suitable for (bio)sensing platforms and fluorescent tracking of drug metabolism in the human body. In addition, QDs can be used in disease diagnosis, medication research, and theranostics due to their optical properties and ability to be bound to biomolecules. They can also act as drug carriers, delivering drugs to specific targets and minimizing adverse effects. Furthermore, QDs have potential applications in neuroscience for visualizing brain structure and function, as well as in wearable optoelectronic devices for medical applications.
What is the maximum weight of "short peptides" in KDa?
4 answers
Short peptides with a maximum weight of 1 KDa have been identified in the literature.
What is the role of Glycine in stacking gel in SDS-PAGE?
5 answers
Glycine plays a crucial role in the stacking gel of SDS-PAGE. It is a key component of the discontinuous buffer system used in SDS-PAGE, which helps in concentrating protein samples and ushering them through the stacking layer. When an electric field is applied, Glycine anions move towards the stacking layer and become more neutrally charged, while anions such as Chloride move more quickly towards the anode. This creates a steep and narrow voltage gradient between the Chloride ion front and the neutral Glycine zwitterion front, resulting in the concentration of protein samples in this zone. In the resolving front, Glycine ions become negatively charged and, along with Chloride ions, move towards the anode, depositing the proteins in a tight band on the resolving layer. The use of Glycine in the stacking gel helps in the efficient separation and resolution of proteins based on their molecular weight.