Cellulose Porous Particles, and Microcarrier for Culture Use which Comprises Same

2:

• The cellulose porous particles according to claim 1, wherein the charge capacity of the porous particles is 0.05 mmol/g to 5.0 mmol/g.

3:

• The cellulose porous particles according to claim 1, wherein at least a portion of the polypeptide is a cell adhesive peptide.

4:

• The cellulose porous particles according to claim 1, wherein at least a portion of the polypeptide is a peptide having the amino acid sequence ArgGlyAsp (RGD).

5:

• The cellulose porous particles according to claim 1, wherein the loading amount of the polypeptide is 10 nmol/g to 1 mmol/g per 1 g of cell culture carrier (dry cellulose porous particles).

6:

• The cellulose porous particles according to claim 1, wherein the loading amount of the polypeptide is 1.1 μmol/g to 1 mmol/g per 1 g of cell culture carrier (dry cellulose porous particles).

7:

• The cellulose porous particles according to claim 1, wherein the number of amino acid residues in the polypeptide is 5 to 30 residues.

8:

• The cellulose porous particles according to claim 1, wherein the specific surface area of the dry cellulose porous particles is 0.3 m2/g to 4.4 m2/g.

9:

• The cellulose porous particles according to claim 1, wherein cellulose has multiple pores, with a mean pore size of 5 μm to 100 μm.

10:

• The cellulose porous particles according to claim 9, wherein the pores form a continuous pore structure with adjacent pores mutually communicating by openings in the membranes dividing them.

11:

• The cellulose porous particles according to claim 1, wherein the mean particle size is 100 μm to 1000 μm.

12:

• The cellulose porous particles according to claim 1, wherein the cationic substituent is at least one selected from the group consisting of primary amino, secondary amino and tertiary amino groups.

13:

• The cellulose porous particles according to claim 12, wherein the cationic substituent is a tertiary amino group.

14:

• The cellulose porous particles according to claim 1, wherein the polypeptide is bonded to the cellulose via a spacer, the chain length of the spacer being 5 to 20 atoms.

15:

• A culturing microcarrier comprising cellulose porous particles according to claim 1.