1959
DOI: 10.1111/j.1550-7408.1959.tb04359.x
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Immobilizing Antigens of Tetrahymena pyriformis*

Abstract: SYNOPSIS. Studies cf 3 conjugating strains of Tetrahymena pyriformis grown in a bacterized medium indicated the presence of a system of alternative immobilizing surface antigens. Each strain was found to have the potential for the expression of 3 serologically unrelated antigens. These consisted of a “high temperature” antigen (expressed in the range of 20–35d̀C), a “low temperature” antigen (exhibited in cultures at 10d̀), and an antigen induced by growth in the presence of the above‐mentioned “high temperat… Show more

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Cited by 39 publications
(21 citation statements)
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“…This suggests that each variety of T. pyriformis may have a unique array of serotypes. It is also known, however, from genetic (Nanney and Dubert, 1960) and other studies (Loefer, unpublished; Loefer and Owen, 1961;Margolin et al, 1959), in which selected strains were used, that strains exhibiting unique serotypes have affinities within the variety. Accordingly, the hopeful taxonomist might employ the serotype to subordinate the positive-reacting strains of a given variety.…”
Section: John B Loefer and Otto H Scherbaummentioning
confidence: 94%
See 1 more Smart Citation
“…This suggests that each variety of T. pyriformis may have a unique array of serotypes. It is also known, however, from genetic (Nanney and Dubert, 1960) and other studies (Loefer, unpublished; Loefer and Owen, 1961;Margolin et al, 1959), in which selected strains were used, that strains exhibiting unique serotypes have affinities within the variety. Accordingly, the hopeful taxonomist might employ the serotype to subordinate the positive-reacting strains of a given variety.…”
Section: John B Loefer and Otto H Scherbaummentioning
confidence: 94%
“…Additional observations indicated that a clone of a given strain, if maintained in culture at a lower temperature, e.g., at 10°C, oftentimes transformed to a serotype different from that exhibited in the first instance. Temperature-induced transformations were subsequently shown for several strains of variety 1 (Margolin et al, 1959). In more extended studies (Loefer and Owen, 1961) on seven wild and 71 derived strains of variety 1, at least six antigenic specificities could be demonstrated.…”
Section: John B Loefer and Otto H Scherbaummentioning
confidence: 96%
“…Comparative data were usually obtained from 1:20 or 1:40 dilutions. Most of the antisera (including H, L and I types) prepared from monoxenic cultures WH-6, WH-14, WH-52 and "Hybrid 8" for the earlier sttidies (9) were again employed in these experiments. Many additional antisera were prepared (from selected strains which had been grown at temperatures of 15", 25", and 35"C, and these were also used in comparative tests.…”
Section: Methodsmentioning
confidence: 99%
“…In the WH and N groups of strains new serotypes were observed when the ciliates were cultured at 10°C. A later study with monoxenic cultures of the WH strains (9) indicated that each was capable of exhibiting alternative immobilizing sunface antigens, and the temperature at which the clone was cultured, within certain limits, determined the serotype expressed. WH-52 exhibited an antigen, 52H, in the "high" temperature range of 20"-35"C, which was quite distinct from respective serotypes 14H and 6H exhibited by WH-14 and WH-6 in the same temperature range.…”
mentioning
confidence: 99%
“…Secretion of porphoryn and other pigments by cells in exhausted media is characteristic of certain species, e.g., by T. pigmentosa (Nanney and McCoy 1976) and is indicative of diVerences in metabolic pathways. Antibodies to the cell surface immobilization antigen (i-ag) are species speciWc though intraspeciWc polymorphism is too great to be of practical utility (Loefer et al 1958;Margolin et al 1959). The self-splicing intron of the LSU rRNA discovered by Zaug and Cech (1980) in T. thermophila is present in only Wve of 12 'T.…”
Section: Tetrahymena and The 'T Pyriformis' Morphospeciesmentioning
confidence: 99%