A new size and shape controlling method for producing calcium alginate beads with immobilized proteins
- 1 Department of Biotechnology, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan;
- 2 Department of Biotechnology, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan;
- 3 Department of Applied Physics, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan
- 4 Department of Applied Physics, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan
- 5 Department of Applied Physics, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan
- 6 Department of Applied Physics, Grad. School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan
Abstract
A method for producing size- and shape-con-trolled calcium alginate beads with immobilized proteins was developed. Unlike previous cal-cium alginate bead production methods, pro-tein-immobilized alginate beads with uniform shape and sizes less then 20 micrometers in diameter could successfully be produced by using sonic vibration. BSA and FITC-conjugated anti-BSA antibodies were used to confirm pro-tein immobilization in the alginate beads. Pro-tein diffusion from the beads could be reduced to less than 10% by cross-linking the proteins to the alginate with 1-ethyl-3-(3-dimethylamino-propyl)carbodiimide (EDC) and N-hydroxysul-fosuccinimide (NHSS). The calcium alginate beads could also be arranged freely on a slide glass by using a femtosecond laser.
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