Table 1. Comparison of autophagy types.

	Macroautophagy	Selective autophagy - mitophagy	Chaperone-mediated autophagy	Microautophagy
Autophagosome formation	Formed	Formed	Not formed	Not formed
Degradation of substrate in lysosome	Yes	Yes	Yes	Yes
Key proteins regulating the process	BECN1, proteins from the ATG family	PINK1	LAMP2	Not identified
Process selectivity	Non-specific process	Mitophagy - specific for mitochondria	Applies only to substrates containing a KFERQ sequence	Process specific to very small organelles