相关实验视频

Updated: Jul 25, 2026

Xenopus laevis as a Model to Identify Translation Impairment
10:24

Xenopus laevis as a Model to Identify Translation Impairment

Published on: September 27, 2015

在多索菲拉早期发育过程中对克鲁佩尔蛋白分布的分析揭示了转录后调节

U Gaul, E Seifert, R Schuh

    Cell
    |August 14, 1987
    PubMed
    概括

    果虫胚胎生成涉及复杂的克鲁佩尔 (Kr) 蛋白调节,超出了转录. 转录后的控制,可能是通过内子,控制分段后的Kr蛋白水平,影响后来的发育过程.

    更多相关视频

    Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes12:11

    Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes

    Published on: May 11, 2017

    Optimized Analysis of Proteins from Xenopus Oocytes and Embryos by Immunoblotting09:32

    Optimized Analysis of Proteins from Xenopus Oocytes and Embryos by Immunoblotting

    Published on: September 19, 2025

    相关概念视频

    Transcription01:10

    Transcription

    Overview
    Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
    Transcription Can Produce Different Kinds...
    Chromatin Structure Regulates pre-mRNA Processing02:41

    Chromatin Structure Regulates pre-mRNA Processing

    In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
    The chromatin structure, especially...
    Regulation of Expression Occurs at Multiple Steps02:24

    Regulation of Expression Occurs at Multiple Steps

    Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
    Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
    Transcription01:17

    Transcription

    Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
    Transcription Can Produce Different Kinds of RNA Molecules
    In eukaryotes,...
    Regulation of Expression Occurs at Multiple Steps02:24

    Regulation of Expression Occurs at Multiple Steps

    Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
    Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
    Regulation of Expression at Multiple Steps01:23

    Regulation of Expression at Multiple Steps

    The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...