Agarose gel electrophoresis

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  • Electrophoresis is defined as the transport of electrically charged particles in a direct current electric field. Electrophoretic separation is based on differential rates of migration in the bulk of the liquid phase and is not concerned with reactions occurring at the electrodes. In the early days, electrophoresis was carried out either in free solution or in the supporting media such as paper, cellulose acetate, starch, agarose, and polyacry lamide gel.

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  • This experiment examines a human Alu dimorphism at the PV92 locus. A sample of human cells is obtained by saline mouthwash (alternatively DNA may be isolated from hair sheaths). DNA is extracted by boiling with Chelex® resin, which binds contaminating metal ions. Polymerase chain reaction (PCR) is then used to amplify a chromosome region that contains the PV92 Alu dimorphism. The Alu insertion allele (+) is 300 nucleotides longer than the non-insertion allele (–), so the two alleles are readily separated by agarose gel electrophoresis.

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  • To establish and complete a protocol for genotyping of single polymorphism rs165599 on catechol-O-methyltransferase (COMT) gene by PCR-RFLP. Methods: DNA samples of rs165599 known genotypes by sequencing, using techniques including PCR amplification, restriction fragment length polymorphism, and agarose gel electrophoresis to determine parameters for optimization of the protocol.

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  • Peyronie’s disease is characterized by fibrous plaque formation of the tunica albuginea, causing penile deformity and fertility problems. The aim of the present study was to investigate alterations in the extracellular matrix in Peyronie’s disease. The study used tissues collected by surgical procedure from individuals that presented a well-established disease, while control samples were obtained by biopsies of fresh cadavers. Immunohistochemistry analysis followed by digital quantification was performed to evaluate TGF-b, heparanases and metalloproteinases (MMPs).

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  • The present study was carried out for investigation of polymorphism of FecB and POU1F1 gene in Assam Hill goat. Blood samples pertaining to 80 randomly selected Assam Hill goats having kidding history of single as well as multiple births maintained at three field units viz., Batabari, Nahira and Tetelia under “AICRP on Goat Improvement” were utilized. DNA was extracted using modified phenol chloroform extraction procedure. The quantity and quality of extracted DNA were assessed using spectrophotometry and agarose gel electrophoresis.

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  • Ridge gourd yellow mosaic disease (RgYMD) caused by the strain of Tomato leaf curl New Delhi virus (ToLCNDV) is an emerging disease in India. Early detection of ToLCNDV in ridge gourd has great significance in the management of the disease. An innovative loop-mediated isothermal amplification (LAMP) assay was standardized for rapid detection of ToLCNDV. Assay was carried out using the set of six primers (F3, B3, FIP, BIP, LF and BF) specific to the coat protein (CP) gene of the virus.

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  • Cotton is an important fiber cash crop of India and cotton leaf curl disease is the major biotic constraint that can significantly reduce the production and productivity of the crop. Gossypium hirsutum L. suffered losses in Northern part of India mainly in Haryana due to high incidence of cotton leaf curl disease (CLCuD) and “whitefly” which is the vector of this disease. Development of resistant variety to this disease is most effective, long term and safe method to tackle with this problem.

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  • Fabaceae is one of the most diversified and complex family of flowering plants. The important pulses and the medicinally important plant species under this family have a high market value. Now a day, adulteration in the food and herbal medicinal products has become a severe problem. Adulteration of therapeutic herbs and major pulses with related or conflicting species has proved to be hazardous to human health in several cases. We have projected here, a PCR-based method using some of the major universal DNA barcode primers from the plastid region to address this problem.

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  • Objective of the research was to validate the potential of Syzygium aromaticum and Kaempheria galanga against biofilm formation and plasmid borne drug resistance exhibited by Pseudomonas spp. Antimicrobial property of S.aromaticum and K.galanga on P.aeruginosa culture was assessed using the agar well diffusion method. Crystal violet assay was employed to determine the percentage inhibition of P.aeruginosa biofilm by the extracts following generation of biofilm on multiwell plates.

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  • Total DNA of the anabas specimens (A1, A2, A3, A4) in Vietnam were extracted using PHUSA-IHHNV kit and according to the process of Phu Sa Biochemical Company. The mitochondrial cytochrome oxidase subunit I (COI) gene were amplified using PCR reaction. The obtained PCR products were checked using 2 % agarose gel electrophoresis and were sequenced with both the forward and reverse primers using an automated sequencer ABI 3730XL of Applied Biosystems by Sangers method. The genetic distances (Dij ) between the anabas species in Vietnam (A1, A2, A3, A4) are very small from 0.0046 to 0.

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  • PHÂN TÍCH ĐỊNH TÍNH VÀ ĐỊNH LƯỢNG NUCLEIC ACID 1. ĐIỆN DI - Gel agarose - Gel polyacrylamide 2. QUANG PHỔ KẾ : Đo mật độ quang (OD – Optical density) 13 ĐIỆN DI DNA TRÊN GEL AGAROSE - Điện di theo phương nằm ngang - Giá thể là gel agarose - Phát hiện với màu nhuộm ethidium bromide, ...… phát huỳnh quang dưới đèn tử ngoại - Khả năng phân giải trung bình, phụ thuộc vào nhiều yếu tố, đặc biệt là nồng độ agarose 14 ĐIỆN DI TRONG TRƯỜNG XUNG (PULSED-FIELD ELECTROPHORESIS) 15 ĐIỆN DI TRÊN GEL POLYACRYLAMIDE - Điện di theo phương thẳng đứng - Giá...

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  • High-quality RNA extraction are very important for further downstream molecular applications such as transcript amplifications by reverse transcriptase-polymerase chain reaction (RT-PCR) and elaboration of cDNA for expressed gene study. Aspergillus flavus is the paramount aflatoxin producing fungus in cultivated oil seeds. The methodology with some modification is described here that allows the intact RNA isolation from mycelium.

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