000 01602nab a22003617a 4500
001 G51055
003 MX-TxCIM
008 121211b |||p||p||||||| |z||| |
022 0 _a0021-9193
040 _aMX-TxCIM
041 0 _aEn
043 _aUS
072 0 _aL72
082 0 4 _a89-109178
100 1 _aWidner, W.R.
245 0 0 _aTwo highly related insecticidal crystal proteins of Bacillus thuringiensis subsp. kurstaki possess different host range specificities
260 _c1989
340 _aPrinted
500 _aill. references
520 _aTwo genes encoding insecticidal crystal proteins from Bacillus thuringiensis subsp. kurstaki HD-1 were cloned and sequenced. Both genes, designated cryB1, and cryB2, encoded polypeptides of 633 amino acids having a molecular mass of ca. 71 kilodaltons (kDa). Despite the fact that these two proteins display 87 identity in amino acid sequence, they exhibit different toxin specificities. The cryB1 gene product is toxic to both dipteran (Aedes aegypti) and lepidopteran (Manduca sexta) larvae, whereas the cryB2 gene product is toxic only to the latter. DNA sequence analysis indicates that cryB1 is the distal gene of an operon which is comprised of three
546 _aEnglish
595 _aAC
650 1 0 _aAmino acids
650 1 0 _aBacillus thuringiensis
650 1 0 _aBiological control organisms
650 1 0 _aGenes
650 1 0 _aNucleotides
650 1 0 _aParasitism
650 1 0 _aProteins
_91224
700 1 _aWhiteley, H.R,
_ecoaut.
773 0 _tJournal of Bacteriology
_n89-109178
_gv. 171, no. 2, p. 965-974
942 _cJA
999 _c15746
_d15746