Accumulation of anthranilic acid by a mutant strain of Neurospora.

The accumulation of orotic acid by a pyrimidineless mutant of Neurospora.

A definite connection of erotic acid with the biosynthesis of nucleic acid pyrimidines is provided by the finding that erotic acid (7) as well as thymine (8,9) can supplement or replace the folic acid required by certain microorganisms. As suggested by Chattaway (7)) it would appear that folic acid has a function in the biosynthesis of pyrimidines. Furthermore, this function is probably concern...

The Conversion of Shikimic Acid to Anthranilic Acid by Extracts of Neurospora Crassa.

The role of shikimic acid as a common intermediate in the synthesis of phenylalanine, tyrosine, tryptophan, and p-aminobenzoic acid has been recognized for some time (l-3). The enzymes which catalyze the synthesis of shikimic acid from intermediates of carbohydrate metabolism have been observed in extracts of bacteria (4-6) as well as Neurospora crassa (7). On the other hand, the reactions lead...

Growth Responses of a Sulfonamide-requiring Mutant Strain of Neurospora.

The use of isotopic carbon in a study of the metabolism of anthranilic acid in Neurospora.

The finding by Tatum, Banner, and Beadle (l), that the tryptophanless Neurospora mutant strain 10575 accumulates anthranilic acid, which in turn can be utilized for growth of strain 40008, has provided evidence that anthranilic acid is a biochemical precursor of tryptophan in this organism. It has been further established that indole is an intermediate in this conversion (2-5). More recent work...

a genre analytic study of research papers written by bilingual writers and their beliefs: a case of persian-english writers

تحقیق حاضر گزارشی است از تحلیل بخش مقدمه دو دسته از مقالات که عبارتند از: 11 مقاله از دو نویسنده دوزبانه فارسی زبان, که شامل مقدمه 4 مقاله به زبان انگلیسی و چاپ شده در مجلات بین المللی, مقدمه 3 مقاله به زبان انگلیسی و 4 مقاله به زبان فارسی چاپ شده در مجلات داخلی می شود؛ و 12 مقاله از محققان خارجی که در مجله applied linguistics به چاپ رسیده است. مبنای تئوری این تحلیل ها نظریه سوئلز (1990) یا هما...