the ring portion of s-28 was found to be degraded significantly more slowly ( t 1/2 = 56.1 +/- 5.2 min ) than the ring of s-14 ( t 1/2 = 23.8 +/- 2.1 min ) and the n-terminus of s-28 ( t 1/2 = 32.2 +/- 3.0 min ) .
C0037659
s-14
C0074854
s-28