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.
LPN or Licensed Practical Nurse is a professional under the nursing occupation. LPN performs a wide variety of jobs under the direction of a RN or registered nurse or a doctor.In some other locations, LPNs are also called as LVNs or Licensed Vocation Nurses.LPNs are health care community members that offer a variety of beneficial services in a wide range of settings.LPNs provide services on hospitals, private homes and facilities for residential care. There are important requirements to become licensed practical nurse.PNs are health care community members that offer a variety of beneficial services in a wide range of settings. LPNs provide services on hospitals, private homes and facilities for residential care. There are important requirements to become licensed practical nurse.