... Tyr158, Glu2 12, Arg215 and Trp246 in ricin) and another ve conserved residues (Asn 72, Arg 124 , Gln160, Glu195 and Asn196 in abrin -a and abrin-c and Asn78, Arg134, Gln1 72, Glu208 and Asn209 in ricin) ... Journal 27 2 (20 05) 120 1 121 0 ê 20 05 FEBS 120 3 Pulchellin A- chain: cloning and structural studies A A L C Silva et al B C Fig (A) A- chain expression analysis in SDS PAGE, 15% Lane 1, molecular mass ... far-UV CD spectra of rPAC, rPBC, rPAB and native pulchellin CD analyses for the rPAC sample showed a protein prole with predominance of a- helical elements [37]: two negative bands at 22 2 and 20 8...