Table 1.

Enzymes that generate acetyl-S-ACP and propionyl-S-ACP and incorporate them into polyketides with β-alkyl branch (methyl for 1, 2, and 3 at C-12 or ethyl for 3 at C-16 and propionyl for 4).²-⁶

Compd	AT/DC	AT	KS	ACP	HCS	ECH1	ECH2
1	-	PksC	PksF	AcpK	PksG	PksH	PksI
2	-	-	CurC	CurB	CurD	CurE	CurF
3 (C-12)	-	TaV	TaK	TaB	TaC	TaX	TaY
3 (C-16)	TaD	-	-	TaE	TaF	TaX	TaY
4	LnmK	-	-	LnmL	LnmM	LnmF	-