Dog fibrinogen reference serum (DAGA-626)

Dog fibrinogen reference serum, native protein

Canine, Dog
Alternative Names
Dog; Fibrinogen; Serum
Batch dependent - please inquire should you have specific requirements
0.1% Sodium Azide
Frozen -20°C
Antigen Description
Fibrinogen (factor I) is a glycoprotein in vertebrates that helps in the formation of blood clots. It consists of a linear array of three nodules held together by a very thin thread which is estimated to have a diameter between 8 and 15 Angstrom.


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Mesoporous silica nanoparticles-based fluorescent mini sensor array with dual emission for discrimination of biothiols


Authors: Gao, Zhipeng; Wang, Zhaojuan; Qiao, Min; Peng, Haonan; Ding, Liping; Fang, Yu

Development of novel functional silica nanoparticles has drawing great attention in the field of fluorescent sensing as they provide advantages in term of versatile functionalization, high stability, and good biocompatibility. In the present work, a dual-fluorophore-functionalized mesoporous silica nanoparticle was designed and fabricated, where two silanized fluorophores, NAA and RB-2, were chemically bound to the nanoparticle surface. A series of measurements including TEM, BET, FT-IR, TGA and XPS were carried out to characterize the morphology variation and verify the surface functionalization. Fluorescence measurements revealed that the fluorescent nanoparticle displayed typical naphthalene and rhodamine emission bands, where the naphthalene units exhibited weak fluorescence emission due to the modification of 2,4-dinitrobenzenesulfonyl group (DNBS). The reaction with biothiols led to departure of DNBS group and thereby recovered the fluorescence of naphthalene unit. The presence of different biothiols resulted in different extents of fluorescence changes of naphthalene and rhodamine. Moreover, the dual-fluorophore functionalized nanoparticle at different concentration showed different responses to the same biothiol and was used as sensing element to construct a two-element sensor array. By collecting the four signals, the mini sensor array could provide distinct recognition pattern and can realize fingerprint discrimination of the four biothiols (H2S, Cys, Hcy, GSH) in aqueous solution and human serum.

Synthesis, spectroscopic, DFT, HSA binding and docking studies of new 1,5-bis(4-chlorophenyl)-3-(2-(4-methylpiperazin-1-yl)quinolin-3yl)pentane-1,5-dione


Authors: Murugesan, Arul; Singh, Thishana; Rajamanikandan, Ramar; Vinu, Madhan; Ilanchelian, Malaichamy; Lin, Chia-Her; Gengan, Robert Moonsamy

1,5-Bis(4-chlorophenyl)-3-(2-(4-methylpiperazin-1-yl)quinolin-3-yl)pentane-1,5-dione was synthesised and characterised using single-crystal X-ray Crystallography, FT-IR, H-1-NMR, C-13-NMR and UV-Visible spectroscopy. DFT calculations were performed at the B3LYP/6-311++G (d.p) level of theory in the gas phase. Frontier Molecular Orbitals (FMO) yielded HOMO-LUMO energy as: E-HOMO = -6.015 eV, E-LUMO = 2.525 eV and energy gap, similar to E-gap = 3.490 eV. Fukui Function Analysis (FFA) indicated the reactive sites for electrophilic, and nucleophilic attack. The molecule's electrophilic addition site is 4-N in the piperazine group with a value of 0.020. The site for nucleophilic attack is both 13-C and 15-C in the quinoline group with values of 0.02 and 0.031 respectively. The biological activity was elucidated by molecular docking studies that gave a similar to G value for HSA binding of -26.44 kJ mol(-1) which is approximately similar to the experimental value obtained from emission spectral data of -32.15 kJ mol(-1). (C) 2020 Elsevier B.V. All rights reserved.

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