Decades: 1170s 1180s 1190s 1200s 1210s - 1220s - 1230s 1240s 1250s 1260s 1270s
Years: 1219 1220 1221 1222 1223 - 1224 - 1225 1226 1227 1228 1229
Births
Deaths
... molecule is split in the process; it is the light reaction which produces waste oxygen. The light reaction also generates ATP by powering the addition of a phosphate ...