Proteins and crystallisation conditions used in this study.

1Lysozyme, catalase and thaumatin were dissolved in their respective protein buffers.2Glucose isomerase was dialysed for 24 hours at 4°C in its protein buffer.3DsbG was exchanged into its protein buffer prior to concentration.4From Rigaku Corporation crystallisation procedures (http://www.rigaku.com).5Hampton Research crystal screen I condition 36 (http://www.hamptonresearch.com). ADA, N-(2-acetamido)-iminodiacetic acid; HEPES, 4-(2-hydroxyethyl) piperazine-1-ethanesulfonic acid; Tris, tris(hydroxymethyl)aminomethane.6See reference [18].7See reference [17].8See reference [23].