A Biochemical Phylogeny of the Protists by Mark A. Ragan

By Mark A. Ragan

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1975 1976 1976 1976 1976 1976 4 38 Nucleic Acids TABLE 1 (Continued) GC Ratio (%) Organism Ankistrodesmus spp. ) 59-70 Asteromonas gracilaris Chlamydomonas spp. ) 50 60-68 Chlorella spp. ) 43-79 Chlorogonium elongatum Cladophora sp. Dunaliella spp. ) Hydrodictyon reticulatum 54 47 50 54- 61 Lagerheimia ciliata Polytoma spp. ) Polytomella papillata Rhizoclonium japonic um Scenedesmus spp. ) 60 42--65 41 54 52-■64 Spirogyra sp. , 1967; Biswas and Sarkar, 1970 " Space does not allow even a representative sample of bacteria and actinomycetes to be included in this table.

F u r t h e r m o r e , B e a u c h e m i n et ai ( 1 9 7 3 ) h a v e d e s c r i b e d t h e v i r t u a l i d e n t i t y of c o m p o n e n t s f r o m A. nidulans a n d E. coli. There are indications that some chloroplastic a m i n o a c y l - t R N A synthet a s e s m a y be e n c o d e d in t h e c h l o r o p l a s t g e n o m e of Euglena gracilis s t r a i n Β ( R e g e r et ai, 1970) a n d E. gracilis s t r a i n Ζ ( P a r t h i e r et ai, 1972; K r a u s p e a n d P a r t h i e r , 1973), b u t n o t in E.

60 42--65 41 54 52-■64 Spirogyra sp. , 1967; Biswas and Sarkar, 1970 " Space does not allow even a representative sample of bacteria and actinomycetes to be included in this table. Reported DNA GC ratios for prokaryotes other than those listed here range from 23% for some Mycoplasmatales (Freundt, 1974) to 74% for some Streptomyces spp. (Bradley and Bond, 1974). For further details consult Belozersky and Spirin (1958), Sebald and Veron (1963), Taylor and Storck (1964), Hill (1966), and Buchanan and Gibbons (1974).

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