Related Experiment Video

Updated: Sep 27, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
09:07

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay

Published on: December 19, 2018

Inability of [3H]estriol to induce maximal cooperativity of the estrogen receptor

S Sasson, A C Notides

    Journal of Steroid Biochemistry
    |April 1, 1984
    PubMed

    More Related Videos

    An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause06:18

    An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

    Published on: August 13, 2019

    Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay06:07

    Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay

    Published on: June 7, 2020

    Related Concept Videos

    The Equilibrium Binding Constant and Binding Strength02:18

    The Equilibrium Binding Constant and Binding Strength

    The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
    Cooperative Allosteric Transitions01:58

    Cooperative Allosteric Transitions

    Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
    E1 Reaction: Stereochemistry and Regiochemistry02:43

    E1 Reaction: Stereochemistry and Regiochemistry

    One of the critical aspects of the E1 reaction mechanism, as also observed in E2, is the regiochemistry, with multiple regioisomers obtained as products. In the example discussed, the presence of water as a weak base favors elimination over substitution to generate two alkenes. Given that alkenes’ stability increases with the number of alkyl groups across the double bond, typically, E1 reactions lead to the Zaitsev product, for this is more substituted and stable than the Hofmann product.
    Thermal Electrocyclic Reactions: Stereochemistry01:17

    Thermal Electrocyclic Reactions: Stereochemistry

    The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
    Selection Rules: Thermal Activation
    Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
    [3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

    [3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

    The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
    Quantitative Aspects of Drug-Receptor Interaction01:30

    Quantitative Aspects of Drug-Receptor Interaction

    The receptor occupancy theory connects a drug's response to the number of occupied receptors. With higher drug concentrations, more receptors are occupied, leading to increased responses. The formation of drug-receptor complexes involves association and dissociation rates, which reach equilibrium when the forward and backward reactions are equal. The equilibrium association constant (Ka) and its inverse, the equilibrium dissociation constant (Kd), indicate drug affinity. Higher Ka and lower Kd...