IPTG is a molecular biology reagent utilized in cloning experiments. This compound is used as a molecular mimic of allolactose, a lactose metabolite that triggers transcription of the lac operon.ne advantage of IPTG for in vivo studies is that since it cannot be metabolized by E. coli its concentration remains constant and the rate of expression of lac p/o-controlled genes, IPTG is not a variable in the experiment.
The Ideal Height. The ideal bar stool should be approximately 28 to 30 inches high to match the 42 to 48 inches standard bar height.
Most countertops are 36 inches high and will accommodate bar stools, or chairs that are slightly higher than dining chairs. A comfortable clearance for people's knees below these countertops is 15 inches. Stools for raised 42-inch countertops are usually between 28 and 30 inches tall, giving a comfortable 12 to 14 inches of knee room. The recommended counter overhang also varies with the counter height, with experts suggesting 15 to 18 inches for the lower counter and 12 inches for a raised counter. Whatever height counter you have and whichever kind of seating, allow at least 24 inches of space between each seat for your guests' comfort.