Interactions Between Cell Populations During Morphogenesis

1 Interactions Between Cell Populations During Morphogenesis 

The replacement of 1-Aph by p-Aph (isozymes of alkaline phosphatase) during insect development is also the result of processes at the tissue level. It is known that the larval hypoderm, for which 1-Aph is a biochemical marker, is completely replaced by the adult hypoderm during early pupae formation. Shortly after pu- 

The variability in cell composition of different cell populations is also seen in certain physiological differences between cells. Specifically, an analysis of cloned liver cells showed a wide variability in the amount of albumin in these cells. This variability is dependent upon certain physiological conditions (Bernhard et al., 1973). The development of methods to distinguish between genetic and physiological variability is essential to evaluate the role of gene interaction in the formation of observed heterogeneities. 

Blank spaces indicate not tested because of unavailability of antisera at the time 

Significant variability in the proportions of C3H and C57BL/6 cells in allophenic mice was observed during the investigation of the clonal growth model of the differentiation of the spinal column and skull parts. The cells of C57BL/6 mice predominated in the skull bones while C3H cells comprised most of the spine -especially the lumbar-sacral regions (Moore and Mintz, 1972). 

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