div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 10button div class=ts-image amp-img class=ts-thumb alt=Page 10: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails10jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 11button div class=ts-image amp-img class=ts-thumb alt=Page 11: Craik Lab · UCSF · general-base catalyst and proton donor to the leaving group Tyr37 va138 30Â 30È Gly39 Tyr248 which indicates that the phenolic hydroxyl of Tyr248 forms hydrogen src=https:reader033vdocumentsusreader033viewer20220424055f1e6880c54b341db351cfd6html5thumbnails11jpg width=142 height=106 layout=responsive amp-img divdiv