Téma: Lehninger-Nelson-Cox: Principles of Biochemistry |
|
R.András |
|
A hormone (from the Greek participle “ὁρμῶ”, "to set in motion, urge on") is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. ... https://en.wikipedia.org/wiki/Hormone |
|
|
|
R.András |
|
Szószedet: language of biochemistry (bioinformatika)
We begin in each case by considering the covalent structure of the simple subunits (amino acids, fatty acids, monosaccharides, and nucleotides). These subunits are a major part of the language of biochemistry; familiarity with them is a prerequisite for understanding more advanced topics covered in this book, as well as the rapidly growing and exciting literature of biochemistry. ... http://a-aa.vectrix.hu/bioinfo/Lehninger-Nelson-Cox_Principles-of-Biochemistr ... |
|
R.András |
|
Szószedet: simplicity (egyszerűség)
The relevant facts of biochemistry are many; the student approaching this subject for the first time may occasionally feel overwhelmed. Perhaps the most encouraging development in twentieth-century biology is the realization that, for all of the enormous diversity in the biological world, there is a fundamental unity and simplicity to life. The organizing principles, the biochemical unity, and the evolutionary perspective of diversity, provided at the molecular level, will serve as helpful frames of reference for the study of biochemistry. http://a-aa.vectrix.hu/bioinfo/abox.php?o=o#1.6
Although living organisms contain a very large number of different proteins and different nucleic acids, a fundamental simplicity underlies their structure (Chapter 1). The simple monomeric subunits from which all proteins and all nucleic acids are constructed are few in number and identical in all living species. Proteins and nucleic acids are informational macromolecules: each protein and each nucleic acid has a characteristic information-rich subunit sequence (Fig. 3–15).
Polysaccharides built from only a single kind of unit, or from two different alternating units, are not informational molecules in the same sense as are proteins and nucleic acids (Fig. 3–15). However, complex polysaccharides made up of six or more different kinds of sugars connected in branched chains do have the structural and stereochemical variety that enables them to carry information recognizable by other macromolecules. http://a-aa.vectrix.hu/bioinfo/abox.php?o=o# |
|
|
|
|
|