Baxter, R. and J.T.O. Kirk. 1969. Base Composition of DNA from Chloroplasts and Nuclei of Phaseolus vulgaris. Nature. 222:272-273. Cabib, E., R. Roberts and B. Bowers. 1982. Synthesis of the yeast cell wall and its regulation. Ann. Rev. Biochem. 51: 763-793. Campbell, N. and J. Reece. 2002. Biology. 6th ed. Pearson Education, Inc., San Francisco. Cooper, G.M. 2000. The Cell. 2nd ed. Sinauer Associates, Inc., Sunderland, MA. Ernst, M. and G. Bufler. 1994. Stems of Allium cepa L. contain starch. New Phytol. Laboratory Manual for Introduction to Cellular Biology; Spring 2008. Laboratory 4. Department for Biological Sciences, Wellesley College, p 4.1-4.11. Littau, Virginia Conway. 1958. A Cytochemical Study of the Chloroplasts in Some Higher Plants. American Journal of Botany. 45(1):45-53. Ritsema, T. and S.C.M. Smeekens. 2003. Engineering fructan metabolism in plants. Journal of Plant Physiology. 160:811-820. Von Konratt, M, J.E. Braggins, and P.J. Harris. 1999. A New Technique to Investigate Cell Layers of the Capsule Wall Using Frullania (Hepaticae) as a Case Study. The Bryologist. 102(2):240-248.