TY - RPRT TI - A transmembrane helix dimer: structure and implications. AU - K R MacKenzie AU - J H Prestegard AU - D M Engelman PY - 1997 DO - 10.1126/science.276.5309.131 UR - https://pubmed.ncbi.nlm.nih.gov/9082985/ ID - 9082985 ER -