5hmC	5-hydroxymethylcytosine
adPEO	autosomal dominant progressive external ophthalmoplegia
ALT	alternative lengthening of telomeres
CDKI	CDKI cyclin-dependent kinase inhibitor
DDR	DNA damage repair
D-loop	displacement loop
DNMT	DNA methyltransferases
ECT	electron chain transport
G4	G-quadruplex
HHS	Hoyeraal-Hreidarsson syndrome
HSP	heavy strand promoter
LSP	light strand promoter
MMF	mitochondrial metabolic failure
mtDNA	mitochondrial DNA
mt-lncRNA	long-non coding mtRNA
mt-lncRNA	long-non coding mtRNA
MTS	mitochondrial targeting signal
nDNA	nuclear DNA
OH	heavy strand origin of replication
OL	ligth strand origin of replication
ORC	origin replication complex
RdRP	RNA-dependent RNA Polymerase
RITOLS	ribonucleotide incorporation throughout the lagging strand
ROS	reactive oxygen species
SASP	senescence-associated secretory phenotype
telDNA	telomeric DNA
TET	ten-eleven-translocation
T-loop	telomeric loop