In some cases, the various heterochromatic regions, especially those associated with centromeres, aggregate into a densely staining chromocenter.

The common form of heterochromatin that always remains heterochromatic is called constitutive heterochromatin. 

It is permanently condensed. 

It replicates late in S phase and has a reduced frequency of genetic recombination relative to euchromatic gene rich areas of the genome.

TLS Online TPP Program

#Id: 2826

#Unit 13. Methods in Biology

Affinity chromatography exploits the unique property of extremely specific biological interactions to achieve separation and purification

TLS Online TPP Program

#Id: 2827

#Unit 13. Methods in Biology

Affinity chromatography used for the purification of enzymes, nucleotides, nucleic acids, immunoglobulins, membrane receptors and even to whole cells and cell fragments.

TLS Online TPP Program

#Id: 2828

#Unit 13. Methods in Biology

Ion exchangers often use Gradient elution than isocratic elution, while Gradient elution is based on gradient of pH and ionic strength.

TLS Online TPP Program

#Id: 2829

#Unit 13. Methods in Biology

Affinity chromatography exploits the unique property of extremely specific biological interactions to achieve separation and purification.

TLS Online TPP Program

#Id: 2830

#Unit 13. Methods in Biology

Affinity chromatography used for the purification of enzymes, nucleotides, nucleic acids, immunoglobulins, membrane receptors and even to whole cells and cell fragments.

TLS Online TPP Program

#Id: 2831

#Unit 13. Methods in Biology

Principle of purification of an enzyme by affinity chromatography.