Related Experiment Video
Updated: Feb 16, 2026
08:08
Application of Mouse Parthenogenetic Haploid Embryonic Stem Cells as a Substitute of Sperm
Published on: November 19, 2020
5.1K
Summary
Parthenogenetic activation, crucial for cloning and developmental studies, can be induced in mammalian oocytes using ethanol or strontium. This method enables research on maternal genome influence without male genetic contribution.
Area of Science:
- Developmental Biology
- Reproductive Science
- Genetics
Background:
- Maternal and paternal genomes significantly influence early mammalian development.
- Parthenogenetic embryos, lacking male gamete contribution, are vital for studying this influence.
- Parthenogenesis is essential for biochemical, morphological, and cloning research.
Purpose of the Study:
- To describe a protocol for parthenogenetic activation of mammalian oocytes.
- To provide methods for inducing parthenogenesis using ethanol or strontium.
Main Methods:
- Oocyte activation using ethanol treatment.
- Parthenogenesis induction via strontium-containing medium exposure.
Main Results:
- Successful parthenogenetic activation of mammalian oocytes was achieved.
- Demonstrated two distinct chemical methods for inducing oocyte activation.
Conclusions:
- Ethanol and strontium are effective agents for inducing mammalian oocyte parthenogenesis.
- Parthenogenetic embryos are valuable models for developmental and cloning research.
Related Concept Videos
02:04Co-activators and Co-repressors
8.7K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
8.7K
02:26tRNA Activation
23.2K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
23.2K
01:26Activation Energy
87.2K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
87.2K
02:42Eukaryotic Transcription Activators
12.9K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.9K
01:55Secondary Active Transport
138.4K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
138.4K
01:47Primary Active Transport
201.2K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
201.2K