This gene encodes transthyretin, one of the three prealbumins including alpha-1-antitrypsin, transthyretin and orosomucoid. Transthyretin is a carrier protein; it transports thyroid hormones in the plasma and cerebrospinal fluid, and also transports retinol (vitamin A) in the plasma.
6 Surprising Signs You Need More Sleep. You know the classic signs: You're dragging at work, you're yawning all day, you're sluggish and you swear you can actually hear your bed calling your name. You need to sleep. On the days when a fourth cup of coffee is masking the most obvious signs, you might think you've won the battle. But don't kid yourself.
Your average adult needs 7-9 hours of sleep, but it varies by individual. Teenagers need about 9-9.5, and infants need more (from 10-20 hours depending on age). That being said, each individual has a different required sleep amount, and you should find out how long you need to sleep to not feel tired (you might be one of the very rare that only needs 4-5 hours).