Cart Continue shopping “Cystine Tryptic Agar (CTA) Base Medium” has been added to your cart. Product Price Quantity Subtotal × Phenol Red Broth with Glycerol $2.94 Phenol Red Broth with Glycerol quantity $2.94 × Cystine Tryptic Agar (CTA) Base Medium $1.24 Cystine Tryptic Agar (CTA) Base Medium quantity $1.24 Coupon: Apply coupon Update cart Cart totals Subtotal $4.18 Total $4.18 Proceed to checkout