Excretion of Pigeon Serum Proteins in Pigeon Droppings 1

Abstract

Summary

The pigeon serum proteins albumin (PSA) and gamma globulin (PGG) were present in extracts of pooled pigeon droppings collected within 16 hr of voiding, but were not detected in extracts of pooled pigeon droppings from the same birds that had remained at room temperature for over 1 month. The results of incubating ¹³¹I-labeled PGG or PSA with a pigeon “intestinal contents” extract, an overnight droppings extract, or a month-old droppings extract suggest that continued enzyme activity could account for the absence of PSA and PGG in extracts of month-old droppings.