compound preferably is between 0 01 g l and 5 00 g l more preferably between 0 05 and 4 g l and most preferably between 0 5 and 3 g l the target concentration may be recorded on a tangible data storage medium preferably before the commencement of the fermentation process the tangible storage medium can be a paper as in a written typed or printed document magnetic as in a disk driving or magnetic tape optical as in a cd or electronic as in memory chips those skilled in the art will appreciate that there may be an independent advantage to the presence of the resin apart from sequestration of the precursor compound often the product compound is a hydrophobic compound that is itself also adsorbed onto the rein resulting in its sequestration the sequestration of the product compound is potentially advantageous in a number of respects its isolation is simplified requiring only the physical separation of the resin from the culture medium and the producing organism after fermentation e g by filtration or decantation followed by elution if the product compound is sparingly soluble in the culture medium it may precipitate out when its concentration exceeds a threshold level and interfere with continued production even where solubility is not a factor continued production may be inhibited by an elevated concentration of product compound or the product compound may be unstable and susceptible to degradation unless sequestered onto the resin lastly in the specific context of the present invention if the product compound and the precursor compound bind competetively to the resin binding of the product compound can drive more of the adsorbed precursor compound into solution resulting in its more complete utilization the resin preferably comprises a.