Category: Lab Notes: Molecular Biology

Alternative 5′ and 3′ splice sites allow cells to select different boundaries during RNA splicing, producing mature RNA transcripts with different structures. Learn how spliceosomes, splicing factors, and regulatory sequences control alternative splice-site selection and influence gene expression.

Exon skipping is a form of alternative RNA splicing in which one or more exons are excluded from mature mRNA. Learn how splice sites, splicing factors, and regulatory elements control exon inclusion and skipping and how this process affects gene expression and protein diversity.

Splicing enhancers and silencers are regulatory RNA elements that help control which splice sites are used during RNA splicing. By interacting with splicing factors and the spliceosome, they influence exon inclusion, exon skipping, alternative splicing, and gene expression.

Splice sites are RNA sequence signals that guide the spliceosome during intron removal and exon joining. Learn about 5′ and 3′ splice sites, branch points, splicing factors, mutations, and alternative splicing.

Splicing factors are proteins that regulate RNA splicing by influencing splice-site selection and spliceosome activity. Learn how they control alternative splicing, gene expression, development, and disease.

The spliceosome is a complex molecular machine that removes introns and joins exons during RNA splicing. Learn about its components, assembly, function, alternative splicing, gene regulation, mutations, and role in disease.

RNA splicing removes introns from pre-mRNA and joins exons to produce mature RNA. Learn how the spliceosome controls this process and why RNA splicing is essential for gene expression, protein production, and cellular function.

Introns are regions of genes that are transcribed into pre-mRNA but are usually removed during RNA splicing. Learn how introns differ from exons and how they influence gene expression, alternative splicing, and genetic disease.

Exons are regions of genes that remain in mature RNA after introns are removed during RNA splicing. Learn how exons contribute to mRNA, protein production, alternative splicing, genetic variation, and gene expression.

Codons and anticodons are essential to protein synthesis. Learn how mRNA codons and tRNA anticodons work together to translate genetic information into amino acid sequences and proteins.

The genetic code is the set of rules that allows cells to translate genetic information in DNA and RNA into proteins. Explore codons, transcription, translation, mutations, gene expression, evolution, biotechnology, and the importance of the genetic code in life science and genetics.

Cytosine is a pyrimidine base found in DNA and RNA and plays essential roles in genetic information, DNA replication, gene regulation, DNA methylation, mutations, epigenetics, and genome stability. This overview explores the biological importance of cytosine in genetics, molecular biology, genomics, and biotechnology.

Guanine is a purine nitrogenous base found in DNA and RNA and plays essential roles in genetic information, DNA replication, RNA biology, cellular signaling, nucleotide metabolism, and genome stability. This overview explores the structure and biological importance of guanine in genetics, molecular biology, genomics, and biotechnology.

Translation elongation is the central stage of protein synthesis in which ribosomes decode mRNA and repeatedly add amino acids to a growing polypeptide. Learn about tRNA selection, codon recognition, peptide-bond formation, elongation factors, GTP hydrolysis, ribosome translocation, translation fidelity, and co-translational protein folding.

Ribosome biogenesis is the coordinated process by which cells produce and assemble functional ribosomes. Learn how rRNA transcription, RNA processing, RNA modifications, ribosomal proteins, nucleolar assembly, nuclear export, and quality control generate the machinery required for protein synthesis.