Journals / International Journal of Chemistry and Technology (IJCT) / 2018 / Cilt: 2 - Sayı: 1
Co-Immobilization of pullulanase, glucoamylase and glucose isomerase together with cross-linked enzyme aggregates: Fructose conversion from three enzymes and starch in one step
- Pages
- 63–67
- DOI
- —
Abstract
In this study, in order to obtain fructose syrup from starch, pullulanase (PUL), glucoamylase (GA) and glucose isomerase (GI) were immobilized together with cross-linked enzyme aggregates (CLEAs), and named as 'combi-CLEAs'. The values of Vmaxand Kmfrom the kinetic parameters of combi-CLEAs [(GA + PUL) + GI] were found as 12 U g-1 and 0.1157 mg ml-1 in optimum conditions, respectively. After 50 uses, it was observed that the remaining activity of combi-CLEAs [GA + PUL + GI] was preserved at 46%. The thermal stability of combi-CLEAs [GA + PUL) + GI] was observed to be 44% and 30%, respectively, at 60 and 80 ° C after 24 hours. At the end of 30 days, the storage stabilities of combi-CLEAs [(GA + PUL) + GI] was determined as 56% and 13% at the temperatures of 4 and 25°C, respectively.
Özet
Bu çalışmada nişastadan fruktoz şurubu elde etmekiçinpullulunaz(PUL), glukoamilaz(GA)ve glukozizomeraz(GI)çapraz bağlı enzimagregatları(CLEAs)ile beraber immobilize edildi ve'combi-CLEAs’ olarak isimlendirildi.Combi-CLEAs[GA+PUL)+Gİ]’nın optimum şartlardaki Vmaxand Kmdeğerleri sırasıyla 12 U g-1ve 0,1157 mgml-1 olarak bulundu. Combi-CLEAs[GA+PUL)+Gİ]’nin 50 kullanımdan sonra kalan bağılaktivitesinin%46’ da koruduğugözlendi. 24 saat sonunda,60 ve 80 C’ deCombi-CLEAs [GA + PUL) + Gİ]’nintermal kararlılığının sırasıyla %44 ve %30 olduğu gözlendi. 30 günün sonunda, Combi-CLEAs[GA+PUL)+Gİ]’nin 4ve 25C’ deki depolama kararlılığı ise sırasıyla %56 ve % 13 olarak belirlendi