Regulation on Calcium Oxalate Crystallization and Protection on HK-2 Cells of Tea Polysaccharides with Different Molecular Weights

Table 1

Carboxyl content of TPSs with different molecular weights and CaOx crystal phase difference induced by 0.1 g/L of TPS.

TPS	Molecular weight (kDa)	–COOH content (%)	(g/L)	COM content (%)	COD content (%)
Blank	0	—	0	100	0
TPS0	10.88	11.2	0.1	100	0
TPS1	8.16	12.3	0.1	27	73
TPS2	4.82	12.7	0.1	20	80
TPS3	2.31	11.0	0.1	69	31