ACC	acetyl-CoA carboxylase
ACP	acyl carrier protein
AT	acyltransferase
CCR	crotonyl-CoA carboxylase/reductase
CCRC	crotonyl-CoA reductase/carboxylase
CoA	coenzyme A
CRISPR-Cas9	clustered regularly interspersed palindromic repeats; CRISPR associated (Cas) protein (Cas9)
Cryo-EM	cryo-electron microscopy
KS	ketosynthase
DD	docking domains
DEBS	6-deoxyerythromycin B synthase
DH	dehydrogenase
ECR	enoyl-CoA carboxylase/reductase
ER	enoylreductase
KR	ketoreductase
NRPS	nonribosomal peptide synthetase
PCC	propionyl-CoA carboxylase
PKS	polyketide synthase
PPTase	4-phosphopantetheinyl transferase
Red/ET	homologous recombination system based on the Red operon of lambda phage or RecE/RecT from Rac phage
SNAC	N-acetylcysteamine
TAR	transformation-associated recombination
TE	thioesterase
USER	uracil-excision based cloning
YCC	acyl-CoA carboxylase