The phi (ϕ) and psi (ψ) angles of a right-handed α-helix of L-amino acids are typically:
ϕ Negative, ψ Negative is the scientifically accurate answer to this question. Within the study of Peptide and Ramachandran plo, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of ϕ Negative, ψ Negative directly address what is being asked. Among the other options, ϕ Negative, ψ Positive, ϕ Positive, ψ Negative, and ϕ Positive, ψ Positive do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.