Re: How does genetic control of non-proteins work?

As you may know, genes code for mRNA which is decoded by ribosomes to 
become amino acids chains using tRNAs to fish out the amino acids in the 
cytosol needed for the protein or polypeptide. So basically genes denote 
peptides and not lipids and sugars. But enzymes (enzyme = protein = peptides)
catalyze the biochemical reactions needed to convert lipids or sugars
into other metabolites. Therefore, genetic mutations or variants in the genes
encoding these enzymes influence whether or not the correct non-proteins are
produced by the cell. 
These derived metabolites (lipids, sugars) can have certain roles in the
regulation process whether it be hormones or other biological aspect.