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Related Concept Videos

Reflex Activity01:08

Reflex Activity

A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
Variation01:19

Variation

An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
Variance01:15

Variance

The deviations show how spread out the data are about the mean. A positive deviation occurs when the data value exceeds the mean, whereas a negative deviation occurs when the data value is less than the mean. If the deviations are added, the sum is always zero. So one cannot simply add the deviations to get the data spread. By squaring the deviations, the numbers are made positive; thus, their sum will also be positive.The standard deviation measures the spread in the same units as the data.
Midrange01:07

Midrange

A somewhat easy to compute quantitative estimate of a data set’s central tendency is its midrange, which is defined as the mean of the minimum and maximum values of an ordered data set.
Simply put, the midrange is half of the data set’s range. Similar to the mean, the midrange is sensitive to the extreme values and hence the prospective outliers. However, unlike the mean, the midrange is not sensitive to all the values of the data set that lie in the middle. Thus, it is prone to outliers and...
Impedance Combination01:21

Impedance Combination

Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the voltage division...
Fixed Action Patterns01:06

Fixed Action Patterns

A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.

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IDH2 deficiency enhances ferroptosis-induced vascular inflammation and remodeling in diabetes.

Scientific reports·2026
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Retraction Note: Deficiency of endothelial sirtuin1 in mice stimulates skeletal muscle insulin sensitivity by modifying the secretome.

Nature communications·2026
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APE1/Ref-1 redox function prevents VSMC phenotypic switching through KLF4 suppression.

Cellular signalling·2026
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Endothelial Dysfunction: From Pathophysiology to Novel Therapeutic Approaches 2.0.

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Synergistic Inhibition of Triple-Negative Breast Cancer by Acetylsalicylic Acid and Recombinant Human APE1/Ref-1 in a Mouse Xenograft Model.

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Correction to: P66Shc-Induced MicroRNA-34a Causes Diabetic Endothelial Dysfunction by Downregulating Sirtuin1.

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Related Experiment Video

Updated: Jul 2, 2026

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
07:31

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast

Published on: June 30, 2022

APE1/Ref-1: versatility in progress.

Byeong Hwa Jeon, Kaikobad Irani

    Antioxidants & Redox Signaling
    |August 22, 2008
    PubMed
    Summary

    Apurinic/apyrimidinic endonuclease1/redox factor-1 (APE1/Ref-1) is crucial for DNA repair and gene regulation. Its role in oxidative stress response and cancer makes APE1/Ref-1 a key therapeutic target.

    Area of Science:

    • Molecular Biology
    • Biochemistry
    • Genetics

    Background:

    • Apurinic/apyrimidinic endonuclease1/redox factor-1 (APE1/Ref-1) is a key protein with dual roles in DNA repair and gene transcription.
    • Its functions are critical in cellular responses to oxidative stress.

    Purpose of the Study:

    • To review the extensive research on APE1/Ref-1's functions, interactions, and regulation.
    • To highlight APE1/Ref-1 as a therapeutic target for oxidative stress-related diseases like cancer.

    Main Methods:

    • Literature review and synthesis of existing research on APE1/Ref-1.
    • Analysis of APE1/Ref-1's involvement in DNA repair pathways and transcriptional regulation.
    • Examination of post-translational modifications affecting APE1/Ref-1 activity.

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    An Ecdysone Receptor-based Singular Gene Switch for Deliberate Expression of Transgene with Robustness, Reversibility, and Negligible Leakiness

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    Capture Compound Mass Spectrometry - A Powerful Tool to Identify Novel c-di-GMP Effector Proteins
    12:11

    Capture Compound Mass Spectrometry - A Powerful Tool to Identify Novel c-di-GMP Effector Proteins

    Published on: March 29, 2015

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    Last Updated: Jul 2, 2026

    ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
    07:31

    ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast

    Published on: June 30, 2022

    An Ecdysone Receptor-based Singular Gene Switch for Deliberate Expression of Transgene with Robustness, Reversibility, and Negligible Leakiness
    06:21

    An Ecdysone Receptor-based Singular Gene Switch for Deliberate Expression of Transgene with Robustness, Reversibility, and Negligible Leakiness

    Published on: May 7, 2018

    Capture Compound Mass Spectrometry - A Powerful Tool to Identify Novel c-di-GMP Effector Proteins
    12:11

    Capture Compound Mass Spectrometry - A Powerful Tool to Identify Novel c-di-GMP Effector Proteins

    Published on: March 29, 2015

    Main Results:

    • APE1/Ref-1's multifunctional nature is central to genomic stability and cell survival.
    • Post-translational modifications significantly modulate APE1/Ref-1's biological roles.
    • APE1/Ref-1 is a promising therapeutic target for conditions involving oxidative stress, including cancer.

    Conclusions:

    • Despite significant advancements, the full understanding of APE1/Ref-1's versatility remains incomplete.
    • Further research into APE1/Ref-1 is warranted due to its therapeutic potential in cancer and oxidative stress.