| pK | negative logarithm of the dissociation constant; plasma potassium |
|---|---|
| pK' | apparent value of a pK; negative logarithm of the dissociation constant of an acid |
| pKa | negative logarithm of the acid ionization constant |
| P/N | positive/negative |
| PNAvQ | positive-negative ambivalent quotient |
| DNAh gene | <molecular biology> A gene found in the bacteria Escherichia coli which makes some of the components of the DNA Polymerase III protein, an enzyme which plays an important role in DNA replication. (09 Oct 1997) |
|---|---|
| DNAi gene | <molecular biology> A gene that makes a protein which plays a role in DNA replication. (09 Oct 1997) |
| DNAj gene | <molecular biology> A gene found in the bacteria Escherichia coli which helps the bacteria survive at high temperatures. It also plays an important role in the replication of the DNA of bacteriophage lambda. It is closely linked with the DNAK gene. (09 Oct 1997) |
| DNAk gene | <molecular biology> A gene found in the bacteria Escherichia coli which helps the bacteria survive at high temperatures. It also is important in the replication of the DNA of bacteriophage lambda. It is closely linked with the DNAJ gene. (09 Oct 1997) |
| DNAl gene | <molecular biology> A type of DNA gene which has not been described. (09 Oct 1997) |
| DNAq gene | <molecular biology> A gene found in the bacteria Escherichia coli which makes some of the components of the DNA Polymerase III protein, an enzyme with an important role in DNA replication. (09 Oct 1997) |
| DNA repair gene | A gene engaged in DNA repair. When a DNA repair gene is altered, mutations pile up throughout the DNA. (12 Dec 1998) |
| DNAt gene | <molecular biology> A gene that helps dismantle the replication complex (the combination of proteins and enzymes which work together to replicate the DNA) when the end of the DNA molecule has been reached and replication is finished. (09 Oct 1997) |
| dominant gene | dominance of traits |
| immediate early gene | Class of genes whose expression is low or undetectable in quiescent cells, but whose transcription is activated within minutes after extracellular stimulation such as addition of a growth factor. C fos and c myc proto-oncogenes were among the first IEG's to be identified. Many IEG's encode transcription factors and therefore have a regulatory function. (18 Nov 1997) |
| immune-response gene | <molecular biology> Any of several genes of the major histocompatibility complex that control the immune response of lymphocytes to specific antigens. (09 Oct 1997) |
| integrator gene | <molecular biology> In the Britten & Davidson model for the co ordinate expression of unlinked genes in eukaryotes, sensor elements respond to changing conditions by switching on appropriate integrator genes, which then produce transcription factors that activate appropriate subsets of structural genes. (18 Nov 1997) |
| Ir gene | Immune response genes, located within the MHC of vertebrates. Originally recognised as controlling the level of immune response to various synthetic polypeptides, they are now also recognised as mapping within the regions controlling T-cell help and suppression (I region). (18 Nov 1997) |
| operator gene | A gene with the function of activating the production of messenger RNA by one or more adjacent structural loci; part of the feedback system for determining the rate of production of an enzyme. (05 Mar 2000) |
| overlapping gene | <molecular biology> Different genes whose nucleotide coding sequences overlap to some extent. The common nucleotide sequence is read in two or three different reading frames thus specifying different polypeptides. (18 Nov 1997) |