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.
A cup of Lipton Cup Size Black Tea brewed for three minutes contains 55 mg of caffeine. A cup of Family Size Black Tea contains only 40 mg.