QF solution for Qiagen Plasmid prep
- Known as:
- QF buffer Qiagen Plasmid preparation kit
- Catalog number:
- BQ004
- Product Quantity:
- 1000ml
- Category:
- -
- Supplier:
- Intron
- Gene target:
- solution for Qiagen Plasmid prep
Related genes to: QF solution for Qiagen Plasmid prep
- Gene:
- PREP NIH gene
- Name:
- prolyl endopeptidase
- Previous symbol:
- -
- Synonyms:
- -
- Chromosome:
- 6q21
- Locus Type:
- gene with protein product
- Date approved:
- 1996-03-12
- Date modifiied:
- 2016-10-05
Related products to: QF solution for Qiagen Plasmid prep
Related articles to: QF solution for Qiagen Plasmid prep
- In this study, the glucansucrase-encoding gene () from P2 was cloned and heterologously expressed in BL21(DE3). A 4542 bp fragment encoding 1510 amino acids was obtained, and the recombinant enzyme exhibited a molecular weight of approximately 161 kDa with a theoretical pI of 4.74. After Ni-IDA affinity chromatography, the specific activity reached 300.19 U/mg with a purification fold of 18.43. Enzymatic characterization revealed that the recombinant glucansucrase displayed optimal activity at pH 5.5 and 30 °C, and retained over 70% relative activity after 48 h incubation at 10-30 °C. The enzyme was significantly activated by Ca, while strongly inhibited by Ni, Cd, SDS, EDTA, DTT, and high concentrations of organic solvents. Kinetic analysis using sucrose as substrate yielded of 0.56 mM and of 4.57 U/mg, indicating exceptionally high substrate affinity. Using this recombinant enzyme, exopolysaccharide (EPS) was synthesized in vitro, achieving a yield of 59.23 ± 0.21 g/L, representing an 18.79% improvement over EPS synthesis by the wild-type strain. These findings enrich the genetic resources of glucansucrase, provide a promising biocatalyst for efficient EPS production, and establish a foundation for the application of glucansucrase and its polysaccharides products in the food and biotechnology industries. - Source: PubMed
Publication date: 2026/07/19
Wang JinlongJiang JingGao GuboDu RenpengZhao Dan - Biofilm technology is an effective biological wastewater treatment method that has attracted significant attention. As the core component of this technology, biocarriers play a vital role in microorganism attachment and biofilm formation. Polymer materials have long been favored as biocarrier materials due to their excellent properties. However, characteristics such as surface smoothness, hydrophilicity, and electronegativity can hinder microbial colonization and cause biofilms to detach easily. Therefore, developing new modified materials is a key strategy for improving the performance of traditional polymer-based biocarriers. This paper systematically reviews the research progress on modification strategies for polymer-based biocarrier materials, focusing on bulk modification (including filling, blending, and crosslinking), surface modification (such as grafting, etching, coating, and impregnation), and composite modification. Additionally, future research directions in this field are discussed. The goal is to advance the development of high-performance biocarrier materials. - Source: PubMed
Publication date: 2026/07/19
Su DexinChen Yupeng - Transgender (trans) Latinas in the United States face disproportionately higher HIV rates and persistently low use of pre-exposure prophylaxis (PrEP) despite awareness. While geographic access to PrEP has been identified as a barrier in other populations, little is known about how spatial access and community-level vulnerability shape PrEP use among trans Latinas in the US South. Using data from the randomized intervention-waitlist control trial of ChiCAS (N = 144), we examined (1) proximity to Spanish-language PrEP providers, (2) neighborhood vulnerability using the Social Vulnerability Index (SVI), Structural Racism Effect Index (SREI), and the Index of Concentration at the Extremes (ICE), and (3) their associations with PrEP use among trans Latinas at baseline and 6-month follow-up. Multivariable models tested whether baseline contextual factors modified intervention effects. Overall, 15.3% of participants lived in a PrEP desert (≥ 30-minute drive to a Spanish-language PrEP provider). Participants resided in highly vulnerable neighborhoods. Neither PrEP desert status nor community-level vulnerability indices were significantly associated with PrEP use at baseline or follow-up. However, SREI significantly moderated intervention effects (interaction adjusted odds ratio [aOR] = 4.55; 95% confidence interval [CI]:1.08-19.2), with greater intervention impact in areas of higher structural vulnerability. Findings suggest that structural racism, not geographic proximity, more strongly shape PrEP access and use among trans Latinas. Culturally responsive, bilingual interventions like ChiCAS may be particularly effective in structurally disadvantaged settings. Future efforts must address structural and social determinants alongside spatial access to achieve PrEP equity. - Source: PubMed
Publication date: 2026/07/19
Tanner Amanda EMcCoy Thomas PMann-Jackson LilliAlonzo JorgeGoldenberg TamarAviles Lucero RefugioAguilar-Palma Sandy KSong Eunyoung YKong Amanda YRhodes Scott D - SH6 was engineered for heterologous heparosan production, and its growth medium was optimized using a combination of experimental design and machine learning (ML). One-factor-at-a-time shake flask experiments revealed glucose (10 g/L) and yeast extract (17.5 g/L) as the best substrates, producing 50 mg/L heparosan. Plackett-Burman analysis and steepest ascent optimization revealed significant factors, and a central composite design (CCD) optimized nutrient concentrations, predicting 85 mg/L heparosan (validated at 81 mg/L). ML-Gaussian process regression was applied after CCD optimization to fine-tune and cross-check the optimal medium (glucose 8.94 g/L, yeast extract 22.89 g/L, ascorbate 0.38 g/L, β-glycerophosphate 28.2 g/L), producing 85.28 mg/L heparosan (predicted 88.8 mg/L) at the flask scale. Earlier nisin induction (2 h) at the bioreactor scale increased heparosan titers to 119.7 mg/L, and linear glucose feeding (1.5 g/L.h) extended the production phase to 133 mg/L. Medium optimization resulted in nearly doubling heparosan yield compared to the unoptimized medium, setting a new standard for . This work offers a design-of-experiments-ML solution as a viable approach to designing high-yielding, animal-product-free heparosan production methods in a Generally Regarded as Safe (GRAS) microbe. - Source: PubMed
Publication date: 2026/07/17
Guhan SiddharthS ThilakrajSivaprakasam SenthilkumarBalakrishnan Rengesh - Addressing stigma, mental health, and health care access challenges for people living with HIV requires a multifaceted approach. Generative artificial intelligence (GenAI) chatbots may be one component of this approach. GenAI chatbots can reduce travel costs and save time. They provide opportunities to offer users a discreet alternative to human interaction, helping reduce stigma and improve comfort. They are easy to use, have multilingual capabilities and high levels of user satisfaction. Emerging evidence on GenAI chatbots suggests promising potential for enhancing HIV prevention, such as supporting HIV self-testing and providing information on PrEP, counseling, providing access to information, and role-playing HIV status disclosure. Successful implementation of GenAI for HIV care, however, requires careful consideration of ethical and practical issues to ensure safe and responsible use. Building user AI knowledge, trust, and ensuring ethical integrity will require meaningful collaboration between technologists, clinicians, researchers, and those most affected by HIV. - Source: PubMed
Publication date: 2026/07/17
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