Macrophages are specialized cells involved in detection, phagocytosis and destruction of bacteria. Macrophages, widely distributed in organs and connective tissue plays central roles in innate and adaptive immunity.  In addition to ingesting microbes, macrophages also ingest dead host cells, including cells that die in tissues because of trauma or interrupted blood supply and neutrophils that accumulate at sites of infection.

Southern Blotting Process

Southern blotting is a hybridization technique for identification of particular size of DNA from the mixture of other similar molecules.
Steps in southern blotting process include:

DNA extraction.
Restriction Digestion or DNA Fragmentation.
Agarose Gel Electrophoresis
Denaturation and Depurination
Baking and blocking

Amino Acids

Amino acids are amphoteric electrolytes (also called as ampholytes) and can act as both acid (proton donor) and base (proton acceptor). They are joined together by condensation reaction between amino group of one acid and carboxyl group of another. Bond formed between two amino acids is known as peptide bond. Amino acids combine through peptide bond formation to form proteins, building blocks of life.