Open Access. Powered by Scholars. Published by Universities.®

Molecular Biology Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 2 of 2

Full-Text Articles in Molecular Biology

A Temperature-Sensitive Mutant Of Escherichia Coli Affected In The Alpha Subunit Of Rna Polymerase, Majid Mehrpouyan Dec 1990

A Temperature-Sensitive Mutant Of Escherichia Coli Affected In The Alpha Subunit Of Rna Polymerase, Majid Mehrpouyan

Electronic Theses and Dissertations

A temperature-sensitive mutant of Escherichia coli affected in the alpha subunit of RNA polymerase has been investigated. Gene mapping and complementation experiments placed the mutation to temperature-sensitivity within the alpha operon at 72 min on the bacterial chromosome. The rate of RNA synthesis in vivo and the accumulation of ribosomal RNA were significantly reduced in the mutant at 44$\sp\circ$C. The thermostability at 44$\sp\circ$C of the purified holoenzyme from mutant cells was about 20% of that of the normal enzyme. Assays with T7 DNA as a template showed that the fraction of active enzyme competent ...


Analysis And Characterization Of The Major Histocompatibility Complex Of Domestic Animals , Yuanxin Xu Jan 1990

Analysis And Characterization Of The Major Histocompatibility Complex Of Domestic Animals , Yuanxin Xu

Retrospective Theses and Dissertations

The major histocompatibility complex (MHC) is a family of genes coding for molecules which play important roles in the immune response as well as many other cellular processes of a vertebrate organism. The understanding of the immune system of some of the domestic animals will have both practical value and theoretical significance. The purpose of this work was to study the MHC of the chicken (B) and the swine (SLA). First, in order to study the MHC class II gene structure of the chicken, a genomic library was constructed from an inbred chicken line G-B2 (MHC haplotype B[superscript]6 ...