関連する実験動画
Updated: Jul 8, 2026

13:06
In Ovo Electroporations of HH Stage 10 Chicken Embryos
Published on: November 1, 2007
まとめ
鶏の卵白素遺伝子は,メッセンジャー・コーディング領域を中断する6つの干渉配列を含んでいます. これらの非コーディングDNA配列は遺伝子の内部にあり,染色体DNAは最終メッセンジャーRNAよりも大幅に長くなっています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 遺伝子発現の表現について
背景:
- 以前の研究では,鶏の卵性アルブミン遺伝子における中断を特定しました.
- 遺伝子構造を理解することは,遺伝子発現機構の解読に不可欠です.
研究 の 目的:
- 鶏の卵性アルブミン遺伝子内の中断をさらに調査し,特徴づけるために.
- オバルブミン遺伝子の中間配列の数と位置を決定する.
主な方法:
- DNA配列と遺伝子構造の分析.
- 遺伝子組織をメッセンジャーRNA (mRNA) と補完DNA (cDNA) と比較する.
主要な成果:
- 鶏の卵子アルブミン遺伝子内の6つの干渉配列の証拠.
- すべての中間配列は,mRNAのアミノ酸をコードする部分に対応する領域に位置しています.
- 七つのコードの断片は,線形に並び,同じ方向に配置されています.
- オバルブミンmRNAの完全なコード配列は,mRNAの長さの3倍以上の6000bpの染色体DNA領域に含まれています.
結論:
- オバルブミン遺伝子は,複数の干渉配列を持つ"分割遺伝子"である.
- 染色体遺伝子の広範な非コーディングDNAは,真核生物の遺伝子構造と成熟したmRNAの違いを強調しています.
関連する概念動画
Organization of Genes
Overview
Organization of Genes
Overview
Position-effect Variegation
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Structure of a Gene
A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
Prokaryotic Gene Structure and Organization
Prokaryotic genomes exhibit a streamlined organization of coding and non-coding regions essential for gene expression and protein synthesis. While coding regions contain the genetic instructions for proteins or functional RNAs, non-coding regions regulate the precise transcription and translation of these genes.Coding Regions: Proteins and RNAsThe primary coding regions, known as structural genes, include sequences transcribed into messenger RNA (mRNA) and ultimately translated into...

