Karakul sheep the terms for newborn lambs' and fetal lambs' pelts are used interchangeably. The newborn lambs have a tight, curly pattern of hair. The lambs must be under three days old when they are killed, or they will lose their black color and soft, tightly wound coils of fur. Dark colors are dominant and lambs often darken in color as they age. Fetal karakul lamb pelts are called broadtail, "Breitschwanz" (German), and "karakulcha". Fetal karakul lambs are harvested through miscarriages, induced early delivery or by killing the mother sheep and removing the fetus. Rather than killing healthy female sheep, farmers will
Fibronectin type III domain Fibronectin type III domain The Fibronectin type III domain is an evolutionary conserved protein domain that is widely found in animal proteins. The fibronectin protein in which this domain was first identified contains 16 copies of this domain. The domain is about 100 amino acids long and possesses a beta sandwich structure. Of the three fibronectin-type domains, type III is the only one without disulfide bonding present. Fibronectin domains are found in a wide variety of extracellular proteins. They are widely distributed in animal species, but also found sporadically in yeast, plant and bacterial proteins. ABI3BP; ANKFN1; ASTN2; AXL; BOC;