>5u42A (A:) observed residues (from ATOM records)
pqvadlkafskhiynaylknfnmtkkkarsiltgkashtapfvihdietlwqaekglvwk
qlvnglppykeisvhvfyrcqcttvetvreltefaksipsfsslflndqvtllkygvhea
ifamlasivnkdgllvangsgfvtreflrslrkpfsdiiepkfefavkfnalelddsdla
lfiaaiilcgdrpglmnvprveaiqdtilralefhlqanhpdaqylfpkllqkmadlrql
vtehaqmmqrikktetetslhpllqeiykdm