What Is The Formula For Calculating The Tm In Pcr

Short DNA sequences used to initiate DNA replication in PCR.

Primers

To make multiple copies of a DNA sequence.

Amplify

Polymerase Chain Reaction, a technique used to amplify DNA.

PCR

Two nucleotides that are complementary and bind together in DNA.

Base pair

A sequence of DNA that can be translated into a protein.

Open reading frame

A specific sequence of nucleotides that signals the start of protein synthesis.

Start codon

A specific sequence of nucleotides that signals the end of protein synthesis.

Stop codon

The two ends of a DNA or RNA molecule.

5' and 3' ends

The melting temperature, a measure of the stability of DNA.

Tm

Restriction enzymes used in molecular cloning.

HindIII and EcoRI

To insert a DNA fragment into a plasmid in a specific orientation.

Directionally sub-clone

A small, circular DNA molecule used in genetic engineering.

Plasmid

To cut DNA at specific sites using restriction enzymes.

Digest

A region of DNA that initiates transcription.

Promoter

A region of DNA that signals the end of transcription.

Transcription terminator

A restriction enzyme that cleaves DNA at the sequence AAGCTT.

HindIII

A restriction enzyme that cleaves DNA at the sequence GAATTC.

EcoRI

A unit of heredity that can be transcribed into RNA or encode a protein.

Gene

A DNA sequence that can increase the transcription of a gene.

Enhancer

A DNA sequence that initiates the transcription of a gene.

Promoter

A DNA sequence that signals the end of transcription.

Terminator

A sequence of DNA that can be translated into a protein.

Open reading frame (mRNA)

The functional output of a gene, which can be mRNA, protein, or other types of RNA.

Gene product

The process by which different combinations of exons are included or excluded from the final mRNA transcript.

Alternative splicing

The material that stores and transmits genetic information.

Genetic material

The process of copying genetic information from parent to offspring.

Replication

The process by which genetic information is used to control the phenotype of an organism.

Gene expression

A change in the genetic material that allows for variation.

Mutation

The structure of DNA, consisting of two complementary strands twisted together.

Double helix

The specific association of adenine with thymine and guanine with cytosine in DNA.

Complementary base pairing

The process of base-pairing complementary nucleic acid strands.

Nucleic acid hybridization

The process of replicating DNA using DNA polymerases.

DNA synthesis

A technique used to amplify DNA sequences in vitro.

Polymerase Chain Reaction (PCR)

A machine used to control the temperature during PCR.

Thermocycler

A technique that allows for the quantification of DNA during the amplification process.

Real-Time Quantitative PCR (qPCR)

A method used to measure the amount of amplified DNA in real time.

Fluorescence-based detection

The complex of DNA and proteins found in the nucleus of a eukaryotic cell.

Chromatin

A condensed and organized structure of chromatin that carries genetic information during cell division.

Chromosome

Proteins that make up most of the chromatin content, including H1, H2A, H2B, H3, and H4.

Histones

The core structure of chromatin consisting of eight histone proteins (two each of H2A, H2B, H3, and H4) around which DNA wraps.

Nucleosome

Chemical modifications (such as methylation, acetylation, and phosphorylation) that occur on histones after they are translated.

Post-translational modification

A model for higher levels of chromatin compaction, where loops of DNA are formed by protein complexes called condensins.

Radial Loop-Scaffold Model

Highly condensed and usually inactive regions of chromosomes.

Heterochromatin

Relaxed and usually active regions of chromosomes.

Euchromatin

A technique used to visualize specific DNA sequences on chromosomes by hybridizing them with fluorescently labeled probes.

Fluorescence In Situ Hybridization (FISH)

Enzymes that synthesize RNA from DNA templates during transcription.

DNA-dependent RNA Polymerases (RNAPs)

The strand of DNA that is not usually transcribed during transcription.

Nontemplate (RNA-like) Strand

The process of synthesizing RNA from a DNA template.

Transcription

DNA sequences that influence the level of transcription and can be located far away from the promoter sequence.

Enhancers

Accessory proteins that recognize promoters and recruit RNA polymerase to the transcription start site.

General Transcription Factors (GTFs)

DNA sequences that determine the start site and regulate the initiation of transcription by RNA polymerase in eukaryotes.

Eukaryotic Promoters

Promoters that are recognized by RNA polymerase II and are complex, consisting of core promoter elements and regulatory promoter elements.

RNA Polymerase II Promoters

A universal eukaryotic transcription factor that recognizes the TATA-box and induces a large bend in DNA.

TATA-binding protein (TBP)

RNA polymerase I, II, and III, respectively, which are required for the initiation of transcription in eukaryotes.

RNAP I, RNAP II, and RNAP III

The phase of RNA polymerase II transcription where the machinery shifts to elongation after initiating RNA synthesis and producing a short transcript.

Elongation mode

The domain of the RPB1 subunit of RNA polymerase II that contains repeats of the consensus sequence Tyr-Ser-Pro-Thr-Ser-Pro-Ser (YSPTSPS) and undergoes reversible phosphorylation.

C-Terminal Domain (CTD) of RNAP II

The modification of eukaryotic mRNA transcripts, including the addition of a cap to the 5'-end, polyadenylation of the 3'-end, splicing of introns, and other internal modifications.

RNA processing

The process by which different combinations of exons are included or excluded from the final mRNA transcript, resulting in the production of different protein isoforms from a single gene.

Alternative splicing

The triplet code that specifies the amino acids in a protein, with each codon consisting of three nucleotides.

Genetic code

The specific way in which the nucleotide sequence of an mRNA is read during translation, determined by the start codon (AUG).

Reading frame

The cap structure added to the 5'-end of eukaryotic mRNA transcripts, essential for mRNA binding by ribosomes and enhancing stability.

7methyl-GTP cap

The phase of translation in eukaryotes where the small ribosomal subunit binds to the 5' cap and scans the mRNA for the first AUG codon.

Initiation phase

Mutations that involve the alteration of a single nucleotide in the DNA sequence, which can affect gene expression by disrupting regulatory and other noncoding sequences.

Point mutations

The process by which gene expression is controlled in eukaryotic cells.

Eukaryotic Gene Regulation

The breakdown of messenger RNA molecules.

mRNA degradation

The membrane-bound organelle in eukaryotic cells that contains the cell's DNA.

NUCLEUS

The fluid portion of the cytoplasm, excluding organelles and other insoluble components.

CYTOSOL

Messenger RNA, a type of RNA molecule that carries genetic information from DNA to the ribosome for protein synthesis.

mRNA

The regulation of RNA degradation processes.

RNA degradation control

The regulation of gene expression at the level of transcription.

Transcriptional control

Sequence specific DNA binding proteins that bind to promoters and enhancers to control transcription initiation.

Transcription factors

A complex of more than 20 proteins that bridges RNA pol II at the promoter and activator or repressor proteins at the enhancer.

Mediator

Proteins that mediate interactions between DNA-binding transcription activators and Mediator, and can also have histone acetyltransferase activity.

Coactivators

Proteins responsible for stimulating recruitment of basal factors and RNA pol II to promoters, and recruiting coactivators to open chromatin structure.

Activators

Proteins that suppress transcription initiation by recruiting corepressors, which prevent RNA pol II complex from binding the promoter or modify histones to close chromatin structure.

Repressors

DNA sequences that act at a distance and regulate gene expression by binding activators or repressors.

Enhancer

Specialized RNAs, such as micro-RNAs (miRNAs), small interfering RNAs (siRNAs), and Piwi-interacting RNAs (piRNAs), that regulate mRNA stability and translation through complementary base pairing.

Small RNAs

A biological response to double-stranded RNA that mediates resistance to endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.

RNA interference (RNAi)

Small interfering RNAs that degrade mRNA, inhibit transcription, and modify chromatin.

siRNAs

micro-RNAs that degrade mRNA, inhibit translation, and modify chromatin.

miRNAs

RNA-induced silencing complex, which is formed by siRNAs or miRNAs and is responsible for cleaving mRNA or repressing translation.

RISC

Primary transcripts containing miRNAs that are processed by Drosha and Dicer to generate mature miRNAs.

pri-miRNA

The process by which the small subunit of the ribosome recognizes a complex structure built around the 5' cap of the mRNA.

Translation initiation

A sequence of adenine nucleotides added to the 3' end of mRNA, which can affect translation efficiency.

poly-A tail

The process of introducing foreign DNA into bacteria, such as E. coli, through methods like heat shock or electric current.

Artificial Transformation of Bacteria

Small, circular DNA molecules that can be used as carriers for cloning DNA fragments in bacteria.

Plasmids

A gene that confers resistance to antibiotics, used as a selectable marker to identify bacteria that have taken up a plasmid.

Antibiotic Resistance Gene

Enzymes that recognize and cleave specific DNA sequences, often used in recombinant DNA technology.

Restriction Enzymes (Endonucleases)

The specific DNA sequence that a restriction enzyme recognizes and cleaves.

Recognition Site

DNA ends that have single-stranded overhangs, either with 5'- or 3'- overhangs, depending on the restriction enzyme.

Sticky Ends

The process of determining the locations of restriction enzyme recognition sites on a DNA molecule.

Restriction Mapping

The addition of a methyl group to DNA, which can affect the ability of restriction enzymes to digest DNA.

DNA Methylation

The process of purifying a specific DNA fragment and making multiple copies of it using cloning vectors.

Cloning Fragments of DNA

DNA molecules, such as plasmids, that are used to carry and replicate DNA fragments in host cells.

Cloning Vectors

A commonly used cloning vector that contains multiple unique restriction sites for cloning DNA fragments.

pUC19 Plasmid

A cloning vector that allows for the production of a specific protein encoded by the inserted DNA fragment.

Expression Vector

Cloning vectors derived from bacterial plasmids, such as pUC19, pBR322, and pBluescript II.

Bacterial Plasmids

Yeast Artificial Chromosomes (YACs) and Bacterial Artificial Chromosomes (BACs)

Cloning vectors used for cloning larger DNA fragments, up to several hundred kilobases in size.

An enzyme used to seal the phosphodiester backbones between a vector and an inserted DNA fragment.

DNA Ligase

The process by which a cell or organism takes up foreign DNA, such as in E. coli where only a small percentage of cells will be transformed with a plasmid.

Transformation