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The Rossmann fold is a tertiary fold found in proteins that bind nucleotides, such as enzyme cofactors FAD, NAD +, and NADP +.This fold is composed of alternating beta strands and alpha helical segments where the beta strands are hydrogen bonded to each other forming an extended beta sheet and the alpha helices surround both faces of the sheet to produce a three-layered sandwich.
Michael G. Rossmann (30 July 1930 [1] – 14 May 2019) [2] was a German-American physicist, microbiologist, and Hanley Distinguished Professor of Biological Sciences at Purdue University who led a team of researchers to be the first to map the structure of a human common cold virus to an atomic level. He also discovered the Rossmann fold ...
The Four Treasures is expressed in a four-word couplet: "The four treasures of the study: Brush, Ink, Paper, Inkstone." (Chinese: 文房四寶：筆、墨、紙、硯; pinyin: Wén fáng sì bǎo: bǐ, mò, zhǐ, yàn) [4] [5] In the couplet mentioned, each of the Treasures is referred to by a single epithet; however, each of these are usually known by a compound name (i.e.
Correction pen. A correction fluid is an opaque, usually white fluid applied to paper to mask errors in text. Once dried, it can be handwritten or handdrawn upon. It is typically packaged in small bottles, with lids attached to brushes (or triangular pieces of foam) that dip into the fluid. The brush applies the fluid to the paper.
Iron gall ink. Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use ...
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