Abstract
Penicillin G acylase (PGA) was immobilized on KIT-6 and SBA-15 with different pore sizes to study the influence of pore size, pore volume and mesophases on the immobilized enzyme (IME) activity. The results show that the pore size, pore volume, mesophase and surface area have an obvious influence on the IME activity, of which the pore size is the most important factor. The activity of PGA immobilized on KIT-6/130 reaches to 3522 IU/g by dry support, which is higher than that ever reported for carrier-bound penicillin G acylase [A.I. Kallenberg, F. van Rantwijk, R.A. Sheldon, Adv. Synth. Catal. 347 (2005) 905–926]. Because of the covalent immobilization, the operational stability of IME increases.
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