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Related Concept Videos

Randomized Experiments01:13

Randomized Experiments

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
Random Sampling Method01:09

Random Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. Among the various sampling methods used by...
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
Genetic Drift03:33

Genetic Drift

Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.Life is not fair. A deer grazing contentedly in a field can have her meal cut tragically short by a bolt of lightning. If the doomed doe is one of only three in the population, 1/3 of the population’s gene pool is lost. Random events like this can...
Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...

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Related Experiment Video

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Engineering and Evolution of Synthetic Adeno-Associated Virus (AAV) Gene Therapy Vectors via DNA Family Shuffling
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Engineering and Evolution of Synthetic Adeno-Associated Virus (AAV) Gene Therapy Vectors via DNA Family Shuffling

Published on: April 2, 2012

Guided selection methods through chain shuffling.

Bao Guo-Qiang1, He Xian-Li

  • 1Department of General Surgery, Tangdu Hospital, Xi'an 710038, Shaanxi Province, China. guoqiang_bao@hotmail.com

Methods in Molecular Biology (Clifton, N.J.)
|June 26, 2009
PubMed
Summary
This summary is machine-generated.

This study details a guided selection method for creating fully humanized Fab antibodies. The technique successfully generates human Fab antibodies that recognize the same epitope as the original antibody.

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Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries
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Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries

Published on: January 17, 2015

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Last Updated: Jun 22, 2026

Engineering and Evolution of Synthetic Adeno-Associated Virus (AAV) Gene Therapy Vectors via DNA Family Shuffling
21:55

Engineering and Evolution of Synthetic Adeno-Associated Virus (AAV) Gene Therapy Vectors via DNA Family Shuffling

Published on: April 2, 2012

Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries
12:55

Scalable High Throughput Selection From Phage-displayed Synthetic Antibody Libraries

Published on: January 17, 2015

Area of Science:

  • Immunotechnology
  • Molecular Biology
  • Biochemistry

Background:

  • Phage display is a powerful technique for antibody discovery.
  • Developing humanized antibodies is crucial for reducing immunogenicity in therapeutic applications.
  • Epitope mapping and antibody selection require robust methodologies.

Purpose of the Study:

  • To establish a procedure for guided selection of fully humanized Fab antibodies.
  • To optimize the process of antibody panning using phage display technology.
  • To generate human Fab antibodies with preserved epitope specificity.

Main Methods:

  • Amplification of human heavy and light chain genes.
  • Cloning of a parental light chain into a phage display vector.
  • Selection of heavy chains from a library and subsequent combination with light chains for phage display panning.
  • Identification and recovery of positive clones for further selection.

Main Results:

  • Successful generation of fully humanized Fab antibodies.
  • Demonstration that the obtained antibodies bind the same epitope as the parental antibody.
  • Validation of the guided selection procedure for antibody engineering.

Conclusions:

  • The guided selection procedure is effective for producing humanized Fab antibodies.
  • This method ensures the preservation of epitope binding specificity.
  • The developed technique offers a valuable approach for antibody development and engineering.