The alpha helix (Î±-helix) is a common secondary structure of proteins and is a righthand-coiled or spiral conformation (helix) in which every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier (hydrogen bonding).his secondary structure is also sometimes called a classic PaulingâCoreyâBranson alpha helix (see below). The name 3.613-helix is also used for this type of helix, denoting the number of residues per helical turn, and 13 atoms being involved in the ring formed by the hydrogen bond.
For other uses, see LPN (disambiguation) . A licensed practical nurse (LPN) in much of the United States and most Canadian provinces is a nurse who cares for people who are sick, injured, convalescent, or disabled. LPNs work under the direction of registered nurses or physicians.or other uses, see LPN (disambiguation) . A licensed practical nurse (LPN) in much of the United States and most Canadian provinces is a nurse who cares for people who are sick, injured, convalescent, or disabled. LPNs work under the direction of registered nurses or physicians.
What is a LPN. LPNs (also known as Licensed Practical Nurse, or Licensed Vocational Nurse) are licensed health care professionals who are trained to handle bedside care of patients dealing with illnesses, injuries and disabilities under supervision of registered nurses, physicians and other health care professionals.he average annual licensed practical nurse or LPN salary is $42,910. The best paid in the industry makes more than $58,020, while the lowest paid earned just shy of $32,000. The highest employment of LPNs and LVNs are found in hospitals and nursing care facilities.