Conchiolins (sometimes referred to as conchins) are complex proteins which are secreted by a mollusc's outer epithelium (the mantle). These proteins are...

together by an organic horn-like compound called conchiolin. The combination of aragonite and conchiolin is called nacre, which makes up mother-of-pearl...

of molluscs the epidermis of the mantle secretes calcium carbonate and conchiolin, and creates a shell. In sea slugs there is a progressive loss of the...

thin, translucent shells, mostly or entirely composed of the protein conchiolin. Snails such as Sphincterochila boissieri and Xerocrassa seetzeni have...

calcareous, in other words mostly made of calcium carbonate.) Corneous opercula are made out of the protein conchiolin. Corneous at dictionary.com v t e...

chitin and conchiolin (a protein hardened with calcium carbonate), except the outermost layer, which in almost all cases is all conchiolin (see periostracum)...

greigite and pyrite. Each sclerite has a soft epithelial tissue core, a conchiolin cover, and an uppermost layer containing pyrite and greigite. Prior to...

calcareous and its keel composed of conchiolin (genus Protatlanta), or the shell composed exclusively of conchiolin (genus Oxygyrus). Only the Atlantidae...

Chemically speaking, this is calcium carbonate and a fibrous protein called conchiolin. As the nacre builds up in layers of minute aragonite tablets, it fills...

shell material from a sequence of tests. It is also possible to test conchiolin, an organic protein found in shell, but it constitutes only 1–2% of shell...

incorporate a substance called conchiolin, often in order to help bind the calcium carbonate crystals together. Conchiolin is composed largely of quinone-tanned...

or composed exclusively of conchiolin (genus Oxygyrus), or the shell can be calcareous and its keel composed of conchiolin (genus Protatlanta). The snails...

used. This shell layer is composed of a type of protein known as conchiolin. Conchiolin is largely composed of quinone-tanned proteins, which are similar...

calcium carbonate (CaCO3) precipitated into an organic matrix known as conchiolin. The outermost layer is the periostracum which is resistant to abrasion...

blue, green, and rose iridescence are delineated by dark brown lines of conchiolin, a proteinaceous material that holds the shell together. The luster of...

ciliates are also thought to be involved in tectin secretion. Chitin Conchiolin Sporopollenin Hyman, Libbie Henrietta (1940). The invertebrates: Protozoa...

layer of the shell is the periostracum, a thin layer composed of horny conchiolin. The periostracum is secreted by the outer mantle and is easily abraded...

snails create shells that are almost entirely formed from the protein conchiolin, most land snails need a good supply of calcium in their diet and environment...

calcium carbonate (the main constituent of limestone and chalk), and of conchiolin, a protein. For more information, see Mollusc shell. In cephalopod mollusks...

effects on the secretion of these globules by the tapetal cells. Chitin Conchiolin Tectin The Evolution of Plant Physiology. London: Elsevier Academic Press...

external calcareous shell, they possess a pseudoconch, consisting of conchiolin, a cartilaginous tissue. The mantle and the gill have disappeared as well...

sediment-water interface while remaining safe. Corbulids developed layers of conchiolin within their shells to better resist predation. Others still, like Pecten...

magenta, shading almost to red. The periostracum, a layer of protein (conchiolin) that is the outermost part of the shell surface, is thin and a pale brown...

crests were able to form by concreting onto narrow sheets of infolded conchiolin, a condition unique to bisonocerids. Other distinctive traits of bisonocerids...

Coarctate – Pressed together, narrowed. Concave – Excavated, hollowed out. Conchiolin Conic – Shaped like a cone. Connective – A part connecting two other parts...

measurements will be consistent with each other. It is also possible to test conchiolin, which is an organic protein found in shell, but this only constitutes...

covered in a thin layer of periostracum, which is made of a protein called conchiolin. The periostracum is brown or black in color, and it helps to protect...

evenly spaced and cover the shell surface. The teleoconch is composed of conchiolin, a transparent cartilaginous material, and its surface lacks sculpture...

of the genus Limax; it is ovoid, solid and chalky with a transparent conchiolin (horny) base. The shell plate is usually convex above and concave beneath...

morphologies. On the teleoconch whorls, the peripheral belt on which the conchiolin keel was attached is very clear. Growth lines are strongly bent backward...