Biophysics

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    Protocols in Current Issue
    Production and Isolation of Magnetic Protein Crystals in HEK293T Cells
    Authors:  Thomas L. Li and Bianxiao Cui, date: 07/20/2020, view: 408, Q&A: 0
    [Abstract] Advances in protein engineering have enabled the production of self-assembled protein crystals within living cells. Our recent publication demonstrates the production of ftn-PAK4, which is a ferritin-containing crystal that can mineralize iron and become magnetic when isolated. We have developed an optimized protocol for the production and ...
    Preparation and Characterization of Ginger Lipid-derived Nanoparticles for Colon-targeted siRNA Delivery
    Authors:  Junsik Sung, Chunhua Yang, James F. Collins and Didier Merlin, date: 07/20/2020, view: 209, Q&A: 0
    [Abstract] Synthetic nanoparticle-based drug delivery system is widely known for its ability to increase the efficacy and specificity of loaded drugs, but it often suffers from relatively higher immunotoxicity and higher costs as compared to traditional drug formulations. Contrarily, plant-derived nanoparticles appear to be free from these limitations of ...
    Evaluating Whole Blood Clotting in vitro on Biomaterial Surfaces
    Authors:  Roberta M Sabino and Ketul C Popat, date: 02/05/2020, view: 1398, Q&A: 0
    [Abstract] Biomaterial-associated thrombosis is still a major concern for blood-contacting implants. After the medical device is implanted and comes in contact with blood, several complex reactions occur, which may lead to thrombus formation and failure of the device. Therefore, it is essential to evaluate the biomaterial interaction with the whole blood. ...
    Opto-magnetic Selection and Isolation of Single Cells
    Authors:  Loïc Binan, Joannie Roy and Santiago Costantino, date: 11/20/2019, view: 1282, Q&A: 0
    [Abstract] Capturing single cells from large heterogenous populations based solely on observable traits is necessary for many cell biology applications and remains a major technical challenge. The protocol we present allows the isolation of viable and metabolically active cells selected for their shape, migration speed, contact to other cells, or ...
    Dynamic and Sequential Protein Reconstitution on Negatively Curved Membranes by Giant Vesicles Fusion
    Authors:  Nicola de Franceschi, Maryam Alqabandi, Winfried Weissenhorn and Patricia Bassereau, date: 07/05/2019, view: 1463, Q&A: 0
    [Abstract] In vitro investigation of the interaction between proteins and positively curved membranes can be performed using a classic nanotube pulling method. However, characterizing protein interaction with negatively curved membranes still represents a formidable challenge. Here, we describe our recently developed approach based on ...
    Preparation of Silk Fibroin Nanoparticles and Enzyme-Entrapped Silk Fibroin Nanoparticles
    Author:  Yu-Qing Zhang, date: 12/20/2018, view: 4023, Q&A: 0
    [Abstract] After silk fiber is degummed in boiling 0.2% Na2CO3 solution, the degummed fibroin fiber could be dissolved in highly concentrated neutral salts such as CaCl2. The partially degraded polypeptides of silk fibroin, commonly called as regenerated liquid silk, could be obtained via water dialysis. The silk fibroin ...
    Microtitre Plate Based Cell-SELEX Method
    Authors:  Munish Shorie and Harmanjit Kaur, date: 10/20/2018, view: 3155, Q&A: 0
    [Abstract] Aptamers have emerged as a novel category in the field of bioreceptors due to their wide applications ranging from biosensing to therapeutics. Several variations of their screening process, called SELEX have been reported which can yield sequences with desired properties needed for their final use. We report a facile microtiter plate-based ...
    Modification and Application of a Commercial Whole-body Plethysmograph to Monitor Respiratory Abnormalities in Neonatal Mice
    Authors:  Yen-Ting Lai and Yi-Shuian Huang, date: 06/20/2017, view: 5808, Q&A: 0
    [Abstract] Proper breathing is essential for mammals to acquire oxygen after birth and requires coordinated actions among several tissues, including diaphragm, intercostal muscles, trachea, bronchi, lung and respiration-regulating neurons located in the medulla oblongata. Genetically modified mice that die early postnatally may have respiratory defects ...



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