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.
A licensed practical nurse (LPN) is a licensed health care practitioner who provides nursing care under the direction of an RN, CNS, NP, midwife, physician, physician assistant, specialist assistant, dentist or podiatrist. LPNs provide compassionate care that is respectful of each patientâs needs, values and wishes.Ns provide health teaching to patients, families, other care providers and the public. They participate in health research and in making health care policies. RNs may work independently, in collaboration with other health care personnel or under clinical supervision (i.e., from a physician or nurse practitioner).