Structural changes in base-paired region 28 in 16 S rRNA close to the decoding region of the 30 S ribosomal subunit are correlated to changes in tRNA binding.

Escherichia coli 30 S ribosomal subunits undergo a reversible change under low monovalent or divalent cation concentration and become inactive in tRNA binding and 50 S subunit association. In the inactive form, 16 S rRNA base-pairs (921-922).(1395-1396) and (923-925).

Three dimensional model for the 16S ribosomal RNA that incorporates information for the mRNA track.

A three dimensional model for the 16S rRNA in the ribosome is described that accommodates information for mRNA.16S rRNA interactions as well as accommodating information that has been used as constraints for determining the internal 16S rRNA structure. mRNA.

Three dimensional model for the 16S ribosomal RNA in the Escherichia coli ribosome.

Molecular modeling has been performed to help correct and refine an approximate three dimensional structure for Eschericia coli 16S rRNA that originated as hand-built wire model. The wire model was built to accommodate the base pairs in 16S rRNA (1), mRNA.16S rRNA interactions (2,3), rRNA.

A method for silver impregnation of mammary myoepithelia.

Histochemical methods for microscopic visualization of mammary myoepithelial cells all yielded considerable variation in completeness of myoepithelial cell staining. Although extremely variable, silver impregnation occasionally gave tissue sections containing myoepithelia having excellent microanatomical detail and contrast with other tissue elements. Consequently, sources of variation in the silver technique were considered.