Answer
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Work Step by Step
Melanosomes are organelles that contain pigments and are present in colored or pigmented cells. Protein cargo in the endomembrane system is synthesized in the ER and is received by the Golgi apparatus, where it is packed into vesicles. The vesicles are moved to their target organelles by the action of cytoskeletal filaments.
Melanosomes are considered lysosome-related organelles because their origin is similar to that of lysosomes, which are formed by the maturation of late endosomes.
The late endosome, also known as the pre-lysosomal compartment, matures from the early endosome that consists of cargo released from the endocytic vesicle. Melanosomes may also originate from an endosome-like compartment, which receives cargo through the endomembrane system. The reason it is devoid of any enzymes could be that the endosome-like compartment from which they are developed may not be the target site of enzyme-carrying vesicles from the Golgi apparatus.
