TY  - RPRT
TI  - Circular beta-lactamase: stability enhancement by cyclizing the backbone.
AU  - H Iwai
AU  - A Plückthun
PY  - 1999
DO  - 10.1016/s0014-5793(99)01220-x
UR  - https://pubmed.ncbi.nlm.nih.gov/10518012/
ID  - 10518012
ER  -