Hydrolysis of nonapeptide P with the enzyme trypsin affords the following fragments: Val-Ile-Ala-Tyr-Ser, Phe-Ala-Ser-Lys. Hydrolysis with chymotrypsin yields: Phe, Ser, Ala-Ser-Lys-Val-Ile-Ala-Tyr. What is the amino acid sequence of P

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.