Fructose 2,6‐bisphosphate and glucose 1,6‐bisphosphate in erythrocytes during chicken development

Abstract
In contrast to mammalian erythrocytes, chicken erythrocytes contain fructose 2,6‐bisphosphate at levels (0.5 cells) similar to those of 2,3‐bisphosphoglycerate (1.2 nmol/109 cells) and slightly lower than those of glucose 1,6‐bisphosphate (5.2 cells). In chick embryo erythrocytes the levels of both fructose 2,6‐bisphosphate and glucose 1,6‐bisphosphate are much lower. They begin to increase at hatching and reach the levels in chicken in a few days.