The Structure of Sugar Osazones¹

Shaken, not stirred: a schools test for aldehydes and ketones

“…Glucose, fructose and other reducing sugars can react in boiling water and is the basis of the osazone test for reducing sugars which was developed by Emil Fischer. 13,[24][25][26][27][28][29][30]…”

Glycopeptides from fibrinogen and fibrin

“…They were designated A, B, and C on the basis of their electrophoretic mobilities.1 The two faster ones, 1 These designations do not correspond to chain designations based on the action of thrombin in which system A chains yield fibrinopeptide A; B chains yield fibrinopeptide B and the T chain is unaffected. As a result, the chain which is unaffected by thrombin appears to contain glycopeptide A (Mester and Moczar, 1965) or IVA (Haschemeyer et al, 1966). B and C, resembled each other analytically but differed from A which had less sialic acid and more hexose and glucosamine.…”

“…According to L. Mester (personal communication), glycopeptide A has C-terminal lysine and some C-terminal threonine, B and C have C-terminal arginine, and C has N-terminal glycine. Mester and Moczar (1965) also separated the chains by sulfitolysis and were able to characterize two of the three fractions. The S-sulfo derivative of the T chain identified by the N-terminal tyrosine was the one with the low sialic acid content (/.<?., A with C-terminal lysine).…”

The Structure of Hydrazones

“…It has been suggested that dimers are formed by intermolecular hydrogen bonding of the syn-form HvVV ,R the former being the more stable 9 . A strong intramolecular hydrogen bond is present in formazans osazones 110 , and monoarylhydrazones of o-quinones, semicarbazones, thiosemicarbazones, alkylhydrazones, and arylhydrazones of keto-acids 9 where the hydrogen bond results in formation of a stable chelate system.…”