Proceeding in a receding economy.

The biotech sector must not only maintain an emphasis on ground-breaking products and focus on retaining key staff but also mobilize to ensure that US health policy continues to reward its innovations.

Differential effects on T cell and NK cell development by tissue-specific expression of H-2D(d) transgene.

The effect of tissue-specific expression of the MHC class I molecule H-2D(d) on T cell and NK cell specificity was studied in transgenic mice expressing the H-2D(d) gene under the control of the mouse metallothionein-I promoter. MTD mice expressed high amounts of H-2D(d) in the liver, intestine and testis, but only minute amounts in the thymus, spleen and kidney. Zinc administration resulted in a 1.