User:Pavankumarm27/sandbox

LYSOSOMES
In 1949 a class of cell particles with centrifugal properties intermediate between those of mitochondria and ribosomes was isolated. The particles were observed in liver cells as rounded, dense bodies and were first called pericanalicular dense bodies. In 1955 de Duve termed these organells as lysosomes, because they contain digestive enzymes capable of lysis or digestion.

lysosomes may originate directly from the endoplasmic reticulum, or from the golgi membranes, and then associate with the vesicles which have araisen by pinocytosis. Protein granuels synthesized by the ribosomes are seen in enlargments of endoplasmic reticulum. These if budded off, give rise to bodies having characteristics of lysosomes.