Reflectin A1
Reflectin A1 - Related Videos
03:38
Polyprotic Acids
0 Views •
2020
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are: Monoprotic acids: Reactions with water HCl (aq) + H2O (l) ⟶ H3O+ (aq) + Cl− (aq) HNO3 (aq) + H2O (l) ⟶ H3O+ (aq) + NO3− (aq) HCN (aq) + H2O (l) ⇌ H3O+ (aq) + CN− (aq) Even though it contains four hydrogen...
05:50
Live Cell Imaging of Muller Glial Nuclear Migration During Zebrafish Retinal Regeneration
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2025
Source: Lahne, M., et.al. Culture of Adult Transgenic Zebrafish Retinal Explants for Live-cell Imaging by Multiphoton Microscopy. J. Vis. Exp. (2017)This video demonstrates live-cell imaging of Muller glial nuclear migration in agarose-embedded zebrafish retinal explants following light-induced photoreceptor damage. Tumor necrosis factor-alpha (TNF-α) released by damaged photoreceptors activates Muller glial cells, triggering nuclear migration through the inner and outer nuclear layers for...
11:55
Culture of Adult Transgenic Zebrafish Retinal Explants for Live-cell Imaging by Multiphoton Microscopy
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Cited by 6 •
2017
Zebrafish retinal regeneration has mostly been studied using fixed retinas. However, dynamic processes such as interkinetic nuclear migration occur during the regenerative response and require live-cell imaging to investigate the underlying mechanisms. Here, we describe culture and imaging conditions to monitor Interkinetic Nuclear Migration (INM) in real-time using multiphoton microscopy.
02:08
Titration of a Polyprotic Acid
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2020
A polyprotic acid contains more than one ionizable hydrogen and undergoes a stepwise ionization process. If the acid dissociation constants of the ionizable protons differ sufficiently from each other, then the titration curve for such polyprotic acid generates a distinct equivalence point for each of its ionizable hydrogens. Therefore, titration of a diprotic acid results in the formation of two equivalence points, whereas the titration of a triprotic acid results in the formation of three...
10:13
Drosophila Preparation and Longitudinal Imaging of Heart Function In Vivo Using Optical Coherence Microscopy (OCM)
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Cited by 24 •
2016
Here, the experimental protocols are described for preparing Drosophila at different developmental stages and performing longitudinal optical imaging of Drosophila heartbeats using a custom optical coherence microscopy (OCM) system. The cardiac morphological and dynamical changes can be quantitatively characterized by analyzing the heart structural and functional parameters from OCM images.
FAQs
Phosphorylation can regulate Reflectin A1’s condensation and assembly by changing the protein’s electrostatic state. These charge changes influence how the intrinsically disordered chains associate with one another and with cellular membranes. Consequently, phosphorylation provides a biochemical control point linking molecular modification to changes in optical nanostructure and reflected wavelengths.
Electrostatic interactions help determine whether Reflectin A1’s charged regions remain dispersed, condense into assemblies, or associate with membranes. These interactions therefore connect molecular charge to physical organization. Changes in organization can alter nanostructure and refractive-index contrast, which affects the wavelengths of light reflected by the resulting material.
Protein sequence, charge, and organization are central variables in Reflectin A1’s biochemical function. Sequence helps establish the available interaction pattern, while charge influences condensation and membrane association. Organization then determines nanostructure and refractive-index contrast, providing a direct route by which molecular properties can tune reflected wavelengths.
Intrinsic disorder is important because it allows Reflectin A1 to participate in regulated condensation, assembly, and membrane association rather than being treated as a fixed structural unit. Phosphorylation and electrostatic interactions can modify these organizational behaviors. This makes the protein useful for examining how biochemical regulation produces changing nanostructures and tunable optical responses.
Biochemical studies can examine how Reflectin A1’s sequence and charge relate to its organization, condensation, assembly, and membrane association. The key interpretive goal is to connect those molecular behaviors with nanostructures, refractive-index contrast, and reflected wavelengths. This framework helps researchers evaluate how changes at the protein level produce different optical properties.
The optical behavior of Reflectin A1 provides a model for designing bio-inspired photonic materials, adaptive coatings, and optical sensors. Its relevance comes from the ability of protein organization to influence refractive-index contrast and reflected wavelengths. These principles may also inform technologies inspired by cephalopod camouflage, where tunable optical responses are central to the desired function.