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Title
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Crystallization and preliminary X-ray studies of psophocarpin B1, a chymotrypsin inhibitor from winged bean seeds.
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Authors
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J.K.Dattagupta,
C.Chakrabarti,
A.Podder,
S.K.Dutta,
M.Singh.
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Ref.
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J Mol Biol, 1990,
216,
229-231.
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PubMed id
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Abstract
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Psophocarpin B1 is a 20,000 Mr protein of winged bean (Psophocarpus
tetragonolobus) seeds having chymotrypsin inhibitory activity. Single crystals
of this protein suitable for X-ray crystallographic studies have been obtained
by the vapour diffusion method using ammonium sulphate. The crystals are
hexagonal, space group P6(4)22 or P6(2)22, cell dimensions a = b = 61 A, c = 210
A. They are stable to irradiation with X-rays and diffract to at least 2.6 A
resolution.
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