TY - RPRT TI - A systematic method for introducing heavy atoms into a protein molecule. AU - A Fenselau AU - D Koenig AU - D E Koshland AU - H G Latham AU - H Weiner PY - 1967 DO - 10.1073/pnas.57.6.1670 UR - https://pubmed.ncbi.nlm.nih.gov/5231402/ ID - 5231402 ER -