Mutation and replication inUstilago maydis

Replication and Mutation on Neutral

Replication and mutation on neutral networks.

Folding of RNA sequences into secondary structures is viewed as a map that assigns a uniquely defined base pairing pattern to every sequence. The mapping is non-invertible since many sequences fold into the same minimum free energy (secondary) structure or shape. The pre-images of this map, called neutral networks, are uniquely associated with the shapes and vice versa. Random graph theory is u...

سیتولوژی Ustilago maydis

رفتار هسته در تلیوسپور، بازیدیوسپور و میسلیوم­های Ustilago maydis مورد بررسی قرار گرفت. جهت کشت تلیوسپورها از محیط PDA + 10% دکستروز استفاده گردید. مطالعه رفتار هسته با استفاده از میکروسکوپ اپی­فلورسنت و رنگ­آمیزی با دو رنگ اتیدیوم برماید و اکردین اورنج صورت پذیرفت. هسته در تلیوسپور کروی و بزرگ و اکثر فضای داخلی آن را اشغال نموده است. بازیدیوسپورها (اسپوریدیوم) به صورت غیرانگلی و به روش جوانه­ز...

Glycolysis in Ustilago maydis.

The kinetic parameters of the 10 glycolytic enzymes and glycolytic fluxes were determined for the first time in Ustilago maydis. Enzyme activities in yeast grown in minimal medium and harvested in the stationary stage were twofold higher than those from yeast grown in rich medium. In contrast, in yeast harvested in the exponential stage, the enzyme activities were higher in cells grown in rich ...

Ultraviolet Light Induced Mutation and Deoxyribonucleic Acid Replication in Bacteria.

HE terminal process through which the genetic change induced by ultraviolet Tlight (UV) is incorporated into the genetic apparatus is the initial postirradiation deoxyribonucleic acid (DNA) replication ( HAAS and DOUDNEY 1959; DOUDNEY and HAAS 1960). It has been suggested that two discrete radiation effects are prerequisite to incorporation of the “potential mutation” into DNA ( DOUDNEY, KADA a...