Table II.
Initial rates and enantioselectivities for the product formation in the transesterification reaction of different sec-alcohols with vinyl butyrate for subtilisin Carlsberg co-lyophilized with MβCD
| Substrates | VSa | VRa | Eb | Substrates | VSa | VRa | Eb |
|---|---|---|---|---|---|---|---|
| First Group | Second Group | ||||||
|
177 | 59 | 3 |
|
255 | 28 | 9 |
|
246 | 12 | 20 |
|
139 | 1.9 | 73 |
|
102 | 2.3 | 44 |
|
59 | 0.4 | 141 |
|
99 | 1.7 | 58 |
|
209 | 2.6 | 80 |
|
183 | 2.7 | 67 | ||||
| Third Group | Fourth Group | ||||||
|
139 | 1.9 | 73 |
|
74 | 1.4 | 51 |
|
228 | 2.2 | 104 |
|
49 | 24.5 | 2 |
|
14 | 0.1 | 126c | ||||
|
32 | 0.1 | 240c | ||||
Initial rates for the S- and R-enantiomer in nmol mg−1min−1
Measured by the ratio of [kcat/KM]S/[kcat/KM]R = VS[R]/VR[S]
Enantioselectivity could not be determined accurately because of the very low value of VR