| transformation, bacterial | The heritable modification of the properties of a competent bacterium by DNA from another bacterial strain. (12 Dec 1998) |
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| eye infections, bacterial | Infections in the inner or external eye caused by microorganisms belonging to several families of bacteria. Some of the more common genera found are haemophilus, neisseria, staphylococcus, streptococcus, and chlamydia. (12 Dec 1998) |
| fibrous bacterial viruses | Deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili. Synonym: fibrous bacterial viruses. (05 Mar 2000) |
| filamentous bacterial viruses | Deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili. Synonym: fibrous bacterial viruses. (05 Mar 2000) |
| fimbriae, bacterial | Thin, hairlike appendages, 1 to 20 microns in length and often occurring in large numbers, present on the cells of gram-negative bacteria, particularly enterobacteriaceae and neisseria. Unlike flagella, they do not possess motility, but being protein (pilin) in nature, they possess antigenic and haemagglutinating properties. They are of medical importance because some fimbriae mediate the attachment of bacteria to cells via adhesins (adhesins, bacterial). Bacterial fimbriae refer to common pili, to be distinguished from the preferred use of "pili", which is confined to sex pili (pili, sex). (12 Dec 1998) |
| luminescence, bacterial | The emission of light by bacteria. It is applied to studies on bacterial viability, metabolism, genetics, adhesiveness, and other physiological properties. (12 Dec 1998) |
| adenovirus e1a proteins | Proteins transcribed from the e1a region of adenovirus which are involved in positive regulation of transcription of the early genes. (12 Dec 1998) |
| adenovirus e1b proteins | Proteins transcribed from the e1b region of adenovirus which are involved in regulation of the levels of early and late gene expression. (12 Dec 1998) |
| adenovirus e1 proteins | The very first viral gene products synthesised after cells are infected with adenovirus. The e1 region of the genome has been divided into two major transcriptional units, e1a and e1b, each expressing proteins of the same name (adenovirus e1a proteins and adenovirus e1b proteins). (12 Dec 1998) |
| adenovirus e2 proteins | Proteins transcribed from the e2 region of adenovirus. Several of these are required for viral DNA replication. (12 Dec 1998) |
| adenovirus e3 proteins | Proteins transcribed from the e3 region of adenovirus but not essential for viral replication. The e3 19k protein mediates adenovirus persistence by reducing the expression of class I major histocompatibility complex antigens on the surface of infected cells. (12 Dec 1998) |
| adenovirus e4 proteins | Proteins transcribed from the e4 region of adenovirus. The e4 19k protein transactivates transcription of the adenovirus e2f protein and complexes with it. (12 Dec 1998) |
| adenovirus early proteins | <molecular biology, protein, virology> Proteins encoded by adenoviruses that are synthesised prior to, and in the absence of, viral DNA replication. The proteins are involved in both positive and negative regulation of expression in viral and cellular genes, and also affect the stability of viral mRNA. Some are also involved in oncogenic transformation. (12 Dec 1998) |
| amino acids, peptides, and proteins | Amino acids and chains of amino acids connected by peptide linkages. (12 Dec 1998) |
| androgen-binding proteins | Carrier proteins produced in the sertoli cells of the testis, secreted into the seminiferous tubules, and transported via the efferent ducts to the epididymis. Participate in the transport of androgens; include also synthetic androgens binding proteins. (12 Dec 1998) |