One end of the tRNA contains an anticodon loop which pairs with a mRNA specifying a certain amino acid. The other end of the tRNA has the amino acid attached to the 3' OH group via an ester linkage. tRNA with an attached amino acid is said to be charged. The enzyme that attaches the amino acid to the 3'-OH is called an aminoacyl tRNA synthetase (aaRS). There is a specific tRNA for each amino acid, 20 in all.
With this tool, they have been able to identify and treat a shoulder injury called a glenoid labrum tear. The shoulder joint has three bones: the shoulder blade (scapula), the collarbone (clavicle), and the upper arm bone (humerus). The head of the upper arm bone (humeral head) rests in a shallow socket in the shoulder blade called the glenoid. The head of the upper arm bone is usually much larger than the socket, and a soft fibrous tissue rim called the labrum surrounds the socket to help stabilize the joint.
All rights reserved. The arrangement of the chest wall, shoulder bones and muscles, and the upper arm create a small hollow called the armpit. The armpit is the underside of the shoulder joint, and is among the warmest areas of the body.The armpit is also called the axilla.Blood and lymph vessels serving the arm travel through the armpit. 2014 WebMD, LLC. All rights reserved. The arrangement of the chest wall, shoulder bones and muscles, and the upper arm create a small hollow called the armpit. The armpit is the underside of the shoulder joint, and is among the warmest areas of the body. The armpit is also called the axilla.