In large bowl, combine flour, ½ cup wheat germ, baking powder and salt; mix well. In separate bowl, whisk together agave nectar, egg whites, buttermilk, butter and lemon zest. Add to flour mixture; stir just until dry ingredients are moistened. Do not overmix. Gently fold in berries. Divide mixture evenly among cavities. Sprinkle with remaining 2 teaspoons wheat germ. Bake 20-22 minutes or until toothpick inserted in center comes out clean. Cool in pan on cooling rack 5 minutes. Serve warm or at room temperature.