Lovastatin biosynthetic pathway gets initiated with acetate units being linked to each other in head-to-tail fashion to form two polyketide chains.
Later,the amino acid methionine donates its methyl group to the growing chain and forms the funtional lovastatin.
However, addition of sodium acetate and amino acid did not have any effect on production of lovastatin in A.
This implies that sodium acetate and amino acid required for biosynthetic pathway of cellular functions are sufficiently produced by organisms when grow in SSF.