Proline Content of United States Honeys

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Abstract
The proline content of 740 U.S. honey samples in two groups was determined. For 482 samples from 1974–75, the mean was 48·3 mg/100g (S = 18·6, range 14·8–139). A group of 258 samples from 1956–57 averaged 54·1 mg/100g (S = 21·9, range 16·9–148). The average loss from 4 months storage at 37°C of 18·6% is relatively minor in comparison with the normal variation found among honey samples. A significant inverse relationship was observed between the solids content of syrups as fed to confined bees and the proline content of the material stored by the bees.