Another motor protein essential for plant cell division is kinesin-like calmodulin-binding protein (KCBP), which is unique to plants and part kinesin and part myosin. Other molecular motors. Besides the motor proteins above, there are many more types of proteins capable of generating forces and torque in the cell.
All real tea (that which comes from the tea plant) naturally contains caffeine. So your lipton tea does contain caffeine. Something that most folks don't know is that even decaf teas contain trace amounts of caffeine. The decaffeination process gets rid of most of the caffeine, but not all.
It may be safe to drink Lipton green tea after the expiration date, but you may not get all the benefits. Tea isn't known to cause food-borne illness. In fact, tea drinking hasn't caused any infectious outbreaks in the United States, according to the Centers for Disease Control and Prevention.