Patent ID: 7291693

Claim:
A method for controlling cell function, proliferation, or differentiation, comprising contacting cells with bioerodible polymer composition comprising a plurality of subunits having a structure of Formula I: wherein, as valence and stability permit, and independently for each subunit, X is selected from O and S; R 1 is selected from H, lower alkyl, hydroxyl, amino, thiol, alkoxy, alkylamino, alkylthio, carbonyl, nitro, cyano, halogen, acyloxy, and acylamino; R is selected from H and substituted or unsubstituted lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl, cycloalkylalkyl, heterocyclyl, heterocyclylalkyl, heteroaryl, aralkyl, or heteroaralkyl; and m represents an integer from 0 to 10.