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Biochemistry
The scientific study of the chemistry of living matter.
Industry: Biology; Biotechnology
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Biochemistry
Red drop
Biology; Biochemistry
The sharp decline in photosynthetic efficiency as the wavelength of exciting light enters the red region (above 680 nm) due to the insensitivity of photosystem II to excitation by red light.
Peptide
Biology; Biochemistry
A compound formed by incomplete hydrolysis of a protein, or by elimination of the elements of water from between the α-carboxy and the α-amino groups of α-amino acids to form a linear polymer.
Neurophysin
Biology; Biochemistry
A protein associated with oxytocin or vasopressin in the secretory cells of the neurohypophysis and in blood; derived from the same protein precursor, proneurophysin, as the hormone it binds.
PH
Biology; Biochemistry
A measure of acidity of aqueous solutions; the negative of the common logarithm of the hydrogen ion concentration, -log(H + ). Values below 7 are acidic; values above 7 are alkaline.
AT-AC intron
Biology; Biochemistry
One of a minority of introns which have at their 5'- and 3'-termini, respectively, the AT and AC sequences. They are excised by a mechanism similar to that for the more common GU-AG introns.
Ramachandran plot
Biology; Biochemistry
A graph that displays calculated energy isotherms for conformations of peptide backbones; phi-angles against psi-angles; energy minima correspond to β-structure, α-helix and the collagen triple ...
Beta (β)-barrel
Biology; Biochemistry
A form of supersecondary structure: a structure within a globular protein in which six or more extended polypeptide strands (β-pleated sheets) are arrayed cylindrically to form the staves of a ...