Strombine is a imino acid produced by a dehydrogenase. Strombine is a compound present in the hemolymph that is capable of cryoprotection[1][2].
[1]. Fields JH, et al. Alanopine and strombine are novel imino acids produced by a dehydrogenase found in the adductor muscle of the oyster, Crassostrea gigas. Arch Biochem Biophys. 1980 Apr 15;201(1):110-4.
[2]. Loomis S H, et al. Identification of strombine and taurine as cryoprotectants in the intertidal bivalve Mytilus edulis[J]. BBA - Biomembranes, 1988, 943(2):113-118.