Table 1.

Percent Sulfated Glycosaminoglycan Retained in Hydrogels Cultured with Transforming Growth Factor-β1

	Day 7	Day 14	Day 21
Agarose	62 ± 3	59 ± 2	44 ± 3a,b
RAD16-I	80 ± 4c	74 ± 1c	73 ± 1c
KLD12	57 ± 4d	60 ± 4d	59 ± 5c,d

Mean ± standard error of the mean; ^a,b,c,d, versus day 7, day 14, agarose, and RAD, respectively, p < 0.05.