𓆉 INDEX PAGE -NOTETHEPOINT43

❥NORTHERN BLOTTING

NORTHERN BLOTTING – 30 MARK DETAILED NOTES 𓆞❥ 𓆞❥ 𓆞❥ 𓆞❥ 𓆞❥ 𓆞 ❥ 𓆞❥ 𓆞❥ Northern blotting is a molecular biology technique used to detect specific RNA molecules in a complex mixture. It provides information about gene expression, RNA size, and transcript abundance by hybridizing RNA with a labeled complementary DNA or RNA probe. 📌 Named by analogy to Southern blotting (DNA detection). 2. Principle The principle of Northern blotting is based on: Separation of RNA molecules by size using denaturing agarose gel electrophoresis Transfer (blotting) of separated RNA onto a nylon or nitrocellulose membrane Hybridization of membrane-bound RNA with a labeled complementary probe Detection of RNA–probe hybrids by autoradiography or chemiluminescence ✔ Only RNA sequences complementary to the probe will be detected. 3. Types of RNA Analyzed mRNA (most common) rRNA tRNA miRNA and siRNA (with modified protocols) 4. Requirements / Materials Total RNA or poly(A)+ RNA Denaturing agarose ...

❃HPLC – High Performance Liquid Chromatography

HPLC – High Performance Liquid Chromatography ┏━━━━━ •❃°•°❀°•°❃•━━━━•━━━┓ 1. Introduction High Performance Liquid Chromatography (HPLC) is an advanced analytical technique used for the separation, identification, and quantification of components present in a mixture. It is based on the differential distribution of analytes between a stationary phase and a liquid mobile phase under high pressure. HPLC is widely used in biochemistry, biotechnology, pharmaceuticals, food analysis, environmental studies, and clinical diagnostics. 2. Principle of HPLC The principle of HPLC is based on partition, adsorption, ion-exchange, or size-exclusion mechanisms, depending on the type of column used. A liquid mobile phase is pumped at high pressure through a column packed with fine stationary phase particles Sample components interact differently with the stationary phase Components with stronger interaction elute slower Components with weaker interaction elute faster Separated components are detec...

Biological Databases – Types of Data and DatabasesNucleotide Sequence Databases (EMBL, GenBank, DDBJ)

Biological Databases – Types of Data and Databases Nucleotide Sequence Databases (EMBL, GenBank, DDBJ) 1. Introduction Biological databases are systematic, computerized collections of biological information that allow efficient storage, retrieval, updating, and analysis of large volumes of biological data. With the advent of genome sequencing, molecular biology, and bioinformatics, biological databases have become essential tools in biological research. These databases support studies in genomics, proteomics, evolutionary biology, taxonomy, medicine, agriculture, and biotechnology. 2. Types of Data Stored in Biological Databases Biological databases store diverse types of biological information, including: 1. Sequence Data DNA sequences RNA sequences Protein sequences 2. Structural Data Three-dimensional structures of proteins Nucleic acid structures 3. Functional Data Gene functions Enzyme activity Regulatory elements 4. Genomic Annotation Data Gene location Exons, introns Promoters a...

Information retrieval from databases - search concepts, Tools for searching, homology searching, finding Domain and Functional site homologies

Information retrieval from databases - search concepts, Tools for searching, homology searching, finding Domain and Functional site homologies Information Retrieval from Databases 1. Introduction Information retrieval in bioinformatics refers to the process of extracting relevant biological data (DNA, RNA, protein sequences, structures, or functional information) from databases. Aim : Identify sequences, functions, or structural features for analysis, comparison, and annotation. Databases can be primary (raw sequence data) or secondary/derived (annotated, processed data). 2. Search Concepts in Biological Databases 2.1 Types of Searches Exact Match Search Returns results only if the query exactly matches database entries. Useful for known accession numbers or IDs. Pattern/Keyword Search Searches based on specific motifs, keywords, or annotations. Example: “kinase domain,” “signal peptide.” Similarity/Homology Search Detects sequences similar to the query based on sequence alignment. Use...

Suspension culture and development - methodology, kinetics of growth and production formation, elicitation methods, hairy root culture. Detailed notes

Suspension culture and development - methodology, kinetics of growth and production formation, elicitation methods, hairy root culture. Detailed notes 1. Introduction Suspension culture is a type of plant tissue culture in which single cells or small cell aggregates are grown in liquid nutrient medium under continuous agitation. It is mainly used for: Large-scale biomass production Secondary metabolite production Cell physiology and biochemical studies Genetic manipulation and selection. 2. Methodology of Suspension Culture 2.1 Source of Explant Usually initiated from friable callus Callus derived from: Leaf Stem Root Hypocotyl Friable callus is preferred as it disintegrates easily into single cells. 2.2 Preparation of Cell Suspension Friable callus is transferred into liquid MS medium Medium contains: Carbon source (usually sucrose) Auxins (2,4-D commonly used) Culture maintained in: Conical flasks Orbital shaker (100–150 rpm) 2.3 Culture Conditions Parameter Requirement Temperature ...

••CLASSIFICATION OF ALGAE - FRITSCH

MODULE -1 PHYCOLOGY CLASSIFICATION OF ALGAE - FRITSCH ❖F.E. Fritsch (1935, 1945) in his book“The Structure and Reproduction of the Algae”proposed a system of classification of algae. He treated algae giving rank of division and divided it into 11 classes. His classification of algae is mainly based upon characters of pigments, flagella and reserve food material. Classification of Fritsch was based on the following criteria o Pigmentation. o Types of flagella o Assimilatory products o Thallus structure o Method of reproduction Fritsch divided algae into the following 11 classes 1. Chlorophyceae 2. Xanthophyceae 3. Chrysophyceae 4. Bacillariophyceae 5. Cryptophyceae 6. Dinophyceae 7. Chloromonadineae 8. Euglenineae 9. Phaeophyceae 10. Rhodophyceae 11. Myxophyce...

Exploitation of Somaclonal and Gametoclonal Variations for Plant Improvement

Exploitation of Somaclonal and Gametoclonal Variations for Plant Improvement 1. Introduction Plant tissue culture often induces genetic and epigenetic variations among regenerated plants. These variations, when stable and heritable, can be exploited as a source of novel traits for crop improvement. Somaclonal variation: Variation arising in plants regenerated from somatic cells cultured in vitro. Gametoclonal variation: Variation arising in plants regenerated from gametic cells (anther, pollen, ovule culture). Both provide additional genetic variability beyond conventional breeding. 2. Somaclonal Variation 2.1 Definition Somaclonal variation refers to genetic variation observed among plants regenerated from somatic tissue cultures, such as callus, suspension cultures, or explants. Term coined by Larkin and Scowcroft (1981). 2.2 Sources of Somaclonal Variation Chromosomal changes Aneuploidy Polyploidy Chromosome rearrangements Gene mutations Point mutations Insertions and deletions...

Microbial Production of PharmaceuticalsSomatostatin, Humulin and Interferons

Microbial Production of Pharmaceuticals Somatostatin, Humulin and Interferons 1. Introduction Advances in recombinant DNA technology have enabled microorganisms to produce human therapeutic proteins safely, economically and in large quantities. Microbial systems such as Escherichia coli and yeast (Saccharomyces cerevisiae) are widely used for the production of pharmaceuticals that were earlier isolated from human or animal tissues. Important microbial-derived pharmaceuticals include somatostatin, human insulin (Humulin) and interferons. 2. Advantages of Microbial Production of Pharmaceuticals High yield and rapid production Cost-effective and scalable Free from animal pathogens Consistent product quality Easy genetic manipulation 3. General Steps in Microbial Production of Recombinant Pharmaceuticals Isolation of target gene Construction of recombinant DNA Insertion into suitable vector Transformation into host microorganism Expression of protein Downstream processing and purification ...

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