Spectrophotometric studies of the developing egg of the grasshopper (Melanoplus differentialis) show, (a) the presence of riboflavin in the newly-laid egg; (b) no changes in the riboflavin of the developing egg occur until late in prediapause (15th to 19th day of development at 25°C.); (c) differences in the transmittance of the acid (pH 4.5) and alkaline (pH 10) diffusible fractions indicate changes in the original riboflavin content of the eggs; (d) during the diapause or resting developmental period no further changes in the riboflavin are noted; ( e) in active postdiapause development changes in the riboflavin increase up to the time of hatching; (f) these changes in riboflavin are thought to be due to the formation of other fluorescing compounds, probably pterines; (g) the fluorescent fraction of the riboflavin is thought to act as a "prosthetic , group" for the pterines thus formed.
Proceedings of the Iowa Academy of Science
©1947 Iowa Academy of Science, Inc.
Bodine, J. H. and Fitzgerald, L. R.
"Abstract: A spectrophotometric study of a developing egg (Orthoptera) with especial reference to riboflavin and its derivatives,"
Proceedings of the Iowa Academy of Science, 54(1), 309-309.
Available at: https://scholarworks.uni.edu/pias/vol54/iss1/49