Esophageal cancer.

The authors invited eminent Belgian specialists to report on their experience in esophageal cancer. A summary is given of the most striking features of their reports.

Temperature jump relaxation study of microtubule elongation in the presence of GTP/GDP mixtures.

GDP was added to microtubules at steady state. The amount of dissociation obtained was dependent on the GDP/GTP ratio and a method was developed to extrapolate to pure GDP conditions. From this extrapolation it was concluded that in the absence of GTP no elongation events occur.