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Heptad ('group of 7') or heptade may refer to: Heptad (chord), heptachord in music (set) Heptad (computing), a group of 7 bits in computing;
The heptad repeat is an example of a structural motif that consists of a repeating pattern of seven amino acids: [1]. a b c d e f g H P P H C P C . where H represents ...
Coiled coils usually contain a repeated pattern, hxxhcxc, of hydrophobic (h) and charged (c) amino-acid residues, referred to as a heptad repeat. [10] The positions in the heptad repeat are usually labeled abcdefg, where a and d are the hydrophobic positions, often being occupied by isoleucine, leucine, or valine.
The doctrine also has a physical dimension, in that each of the heptad is linked to one of the seven creations, which in ancient philosophy were the foundation of the universe. A systematic association is only present in later Middle Persian texts, where each of the seven is listed with its "special domain": [1] [9]
The Heptad also appears in the AN.TAḪ.ŠUM SAR festival, where the Anatolian god Tarḫunna and the Hurrian god Teššub merge with each other, and during which offerings are given to the cart, weapons, thunder, clouds, dew, rains, father-gods, and vizier of Teššub, as well as to the pastistilas Heptad.
The structure of lamins is composed of three units that are common among intermediate filaments: a central α-helical rod domain containing heptad repeats surrounded by globular N and C-terminal domains. The N-terminal is shorter and located at the top (head) while the C-terminal is longer and located at the end (tail).
According to Herodotus of Halicarnassus, the Scythians worshipped a pantheon of seven gods and goddesses (heptad), which he equates with Greek divinities of Classical Antiquity following the interpretatio graeca. He mentioned eight deities divided into three ranks, with this structure of the Scythian pantheon being typically Indo-Iranian: [7 ...
Six-element set of rhythmic values used in Variazioni canoniche by Luigi Nono [1]. A set (pitch set, pitch-class set, set class, set form, set genus, pitch collection) in music theory, as in mathematics and general parlance, is a collection of objects.