1 Symlin Pen is given as an injection under the skin, usually in the stomach area or upper thigh. Do not inject Symlin Pen into the arm, because it may not absorb properly. Rotate injection sites so you do not use the same site repeatedly.  Do not transfer medicine from the pen-injector into a syringe.
It is one of the light-independent reactions used for carbon fixation. Photosynthesis occurs in two stages in a cell. In the first stage, light-dependent reactions capture the energy of light and use it to make the energy-storage and transport molecules ATP and NADPH.
A) The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADPâº to the light reactions. B) The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions.