Some animals of Bengal Safar, Siliguri
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CHROMODOMAIN AND BROMODOMAIN
Chromodomain A chromodomain is a protein structural domain of around 40-50 amino acid residues that is frequently found in proteins involved in chromatin remodelling and manipulation. Additionally, it is referred to as a chromatin organisation modifier. It was discovered for the first time in Drosophila moderators of variegation.The chromodomains remodel chromatin into the condensed shape of heterochromatin, a cytologically observable state of suppressed gene expression.Both plants and animals have a high degree of conservation within the domain.It is encoded by a huge number of proteins found in a wide variety of genomes.Certain genes with chromodomains have several alternative splicing isoforms that lack the chromodomain altogether.Chromodomain-containing proteins are involved in many aspects of gene regulation in mammals, including chromatin remodelling and the development of heterochromatin areas. Additionally, proteins with chromodomains bind methylated histones and are incl...
Gene delivery to a potential transgenic plant
Various methods of gene delivery to a potential transgenic plant. The uptake of foreign DNA or transgenes by plant cell is called transformation. A variety of techniques have been used to introduce transgene into plant cell. This can be grouped into following two major categories:- a) Agrobacterium mediated gene transfer. b) Direct gene transfer. a) Agrobacterium mediated gene transfer :- Agrobacterium tumefaciens is a remarkable species of soil-dwelling bacteria that has the ability to infect plant cells with a piece of its DNA. When the bacterial DNA is integrated into a plant chromosome, it effectively hijacks the plant’s cellular machinery and uses it to ensure the proliferation of the bacterial population. The gene transfer through Agrobact...
Ecological importance of bryophyte.
Ecological importance of bryophyte. Bryophytes are the amphibian member of plant kingdom, which are also known as moss. Unlike most of the higher plants bryophytes are found in groups of individual and they never form any mechanical tissue. Bryophyte often play in the economy of nature, as ecological indicator, medicinal raw materials and many other aspects. Bryophytes are important constituent of ecosystem in temperate and tropical region of earth. They are ecologically important because of following reasons 1. Bryophytes and plant succession : Among the bryophytes the mosses are considered to potent forms of successional process. They colonize over the nutrient poor sides, where no other plant can survive. After death and decay they form humus and increase the soil fertility.Some important species under this category are- Cephalozia media ...
