def parse_atom_chain
import bend-prot@0.1.0.0/pdb.bend as Pdbimport Base
import bend-prot@0.1.0.0/protein.bend as P
276def parse_atom_chain(serial: U32, chain_s: String, seq_s: String, xs: String, ys: String, zs: String, elem_s: String, name_s: String) -> Maybe<&1, U32 & Nat & P.Atom>:
277 parse_atom_seq(serial, chain_u32(chain_s), Nat.read(String.trim(seq_s)), xs, ys, zs, elem_s, name_s)