Resumen
Summary Proteins and amino acids
- Grado
- Institución
Biology A level revision notes on proteins and amino acids
[Mostrar más]Vista previa 1 fuera de 2 páginas
Vista previa 1 fuera de 2 páginas
Añadir al carrito
Añadir al carrito
Vendedor
Seguir
mollybuckwald
Comentarios recibidos
Vista previa del contenido
Proteins All enzymes are proteins
Essential components of cell membrane – functions such as receptor
proteins and signally proteins
Hormones – insulin and glycogen
Oxygen carrying pigment in haemoglobin
Antibodies
Collagen – adds strength to animal tissues such as bones and walls of
arteries
Keratin – hair, nails and surface layer of the skin
Actin and myosin for muscle contraction
Can be storage products
Amino acids
Simplest amino acid is glycine
All have a central carbon bonded to amine group –NH2, and a carboxyl
acid group –COOH
3rd component - hydrogen always bonded
to the carbon atom
20 different amino acids – all with
different R groups
Peptide bonds: 2 amino acids can join together,
1 loses a hydroxyl group –OH and the other
loses a H atom. Therefore the carbon can bond
with the nitrogen forming a peptide bond. The
remaining H2 and O form water.
The new molecule that has been formed is
called a dipeptide. A molecule made of many
amino acids is called a polypeptide. A complete
protein may have one
H2O polypeptide chain or
many more.
In cells, ribosomes are where amino acids are joined to make polypeptides and
the reaction is controlled by enzymes.
By hydrolysis (addition of water), the polypeptides can be broken down into
amino acids, by breaking the peptide bonds. This happens in the small
intestine and stomach during digestion so protein molecules can be
hydrolysed into amino acids to be absorbed.
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mollybuckwald. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 8,62 €. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now