関連する実験動画
Updated: Jul 17, 2026

13:06
In Ovo Electroporations of HH Stage 10 Chicken Embryos
Published on: November 1, 2007
まとめ
研究者は,鶏のオオムコイド遺伝子全体を分離し,その5.6kbの構造と821の核酸メッセンジャーRNAを明らかにしました. 遺伝子は,コード領域内の7つの間接配列を含み,遺伝子の発現を潜在的に調節する側面DNA配列が保存されています.
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
- バイオケミストリー バイオケミストリー
背景:
- 鶏のオウムコイド遺伝子は,卵白の組成に関与する重要なタンパク質です.
- 遺伝子の構造と調節を理解することは,分子生物学の研究にとって極めて重要です.
研究 の 目的:
- 鶏のオオムコイド遺伝子全体を分離し,特徴づけること.
- イントロンとエクソンを含む遺伝子の構造を分析する.
- 遺伝子の横に並ぶ規制性DNA配列を特定するために.
主な方法:
- 鶏の遺伝子ライブラリクローンの分離.
- 制限エンドヌクレアスのマッピング.
- 電子顕微鏡. 電子顕微鏡.
- 直接的なDNAシーケンシング.
主要な成果:
- 5つの独立したクローンの単離で,CL21は完全なオウムコイド遺伝子 (5.6kb) を含んでいる.
- 成熟したメッセンジャーRNAは821ヌクレオチドの長さである.
- 構造遺伝子は,少なくとも8つのセグメントに7つの間隔配列 (イントロン) によって分割されています.
- イントロンはペプチドのコーディング領域内に位置し,翻訳されていない領域は中断されない.
- 遺伝子の末端に並ぶ保存されたDNA配列 (TATATATとTTGT) を特定した.
結論:
- 鶏の卵型卵子型の遺伝子構造は複雑で,複数のイントロンが特徴です.
- 保存された側面配列は,プロカリオットプロモーター要素に類似した遺伝子調節における役割を示唆しています.
関連する概念動画
Complementary DNA
Overview
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...
Complementary DNA
Overview
Complementation Tests
A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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...

