JP2006519606A - リグノセルロース分解性酵素の活性を促進するための方法 - Google Patents
リグノセルロース分解性酵素の活性を促進するための方法 Download PDFInfo
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- JP2006519606A JP2006519606A JP2006506962A JP2006506962A JP2006519606A JP 2006519606 A JP2006519606 A JP 2006519606A JP 2006506962 A JP2006506962 A JP 2006506962A JP 2006506962 A JP2006506962 A JP 2006506962A JP 2006519606 A JP2006519606 A JP 2006519606A
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Abstract
Description
植物物質由来の遊離糖類及び遊離オリゴ糖の生成を向上させる方法が提供される。
植物バイオマスは糖類から構成され、地球上で最大の再生可能炭水化物源となっている。しかしながらその糖類は複合高分子に組み込まれているため、この莫大な資源は十分活用されていない。この複合高分子はしばしば集合的にリグノセルロースと呼ばれる。植物バイオマスを分解して生成される糖類は、発酵して化学品、樹脂、並びに石油の代替品としてのエタノールを含む燃料となる、豊富で経済的競争力のある発酵原料を提供することができると考えられる。
激しい前処理の必要がなく、効率性が向上するリグノセルロースを加水分解するための方法が提供される。これらの方法には、軽度あるいは中程度の条件でリグノセルロースを化学処理して処理済リグノセルロースを生成し、この処理済リグノセルロースを、リグノセルロースの一成分を加水分解することのできる一つ以上の酵素と接触させる手順が含まれる。この化学処理には、酵素処理と併用して糖類を遊離させる作用を持つ一つ以上の化学薬剤とリグノセルロースを接触させる手順を含む。
本発明は、リグノセルロースの加水分解及びリグノセルロースからの糖類生成のための数種類の方法に向けられており、これらの方法は従来記述されている処理法あるいは前処理法と比べて、より経済性に優れより効率的で且つ毒性が低い。一手法では、軽度あるいは中程度の処理温度あるいは圧力、pH、もしくはこれらの組み合わせでリグノセルロースを化学処理して処理済リグノセルロースを生成し、この処理済リグノセルロースを、リグノセルロースを加水分解することのできる一つ以上の酵素と接触させる手順を含む。
酵素は、バイオリアクターを用いてバイオマスを変換させるために一般に利用されている極端な高温あるいは酸処理を含まない、軽度あるいは中程度の条件下で基質と反応させる。例えば酵素は低度から中程度のイオン強度且つpHが中性である緩衝液中で、約20℃から約80℃でインキュベートされ、望ましくは約30℃から約65℃、より望ましくは約37℃から約45℃、さらに望ましくは約37℃、約38℃、約39℃、約40℃、約41℃、約42℃、約43℃、約44℃、約45℃、約46℃、約47℃、約48℃、約49℃、約50℃、約51℃、約52℃、約53℃、約54℃、約55℃、約56℃、約57℃、約58℃、約59℃、約60℃、約61℃、約62℃、約63℃、約64℃、約65℃でインキュベートすることができる。驚くべきことに、この化学処理によって十分な量の糖類を遊離あるいは解離させることができる。「十分な」量によって、利用可能な糖類が少なくとも約20%、約30%、約40%、約50%、約60%、約70%、約80%、約85%、約90%、約95%、及びそれ以上であることが意味される。
酸化剤の相対的強度(例えばhttp://hyperphysics.phy−astr.gsu.edu/hbase/chemical/c1を参照する。)は、標準電極電位から推定することができる(例えばhttp://hyperphysics.phy−astr.gsu.edu/hbase/chenical/c1を参照する。)最も強い酸化剤が標準電極表に示されている(例えばhttp://hyperphysics.phy−astr.gsu.edu/hbase/tables/c1を参照する。)。酸化剤の表の一部には、臭素酸塩並びに塩酸、亜塩素酸、塩素化イソシアヌール酸塩、クロム酸塩、二クロム酸塩、フッ素・塩素・臭素を含むハロゲン、次亜塩素酸塩、次亜塩素酸、硝酸、硝酸塩、亜硝酸塩、酸素、過ホウ酸塩、過塩酸塩、過塩酸、過ヨウ素酸塩、過マンガン酸塩、過酸化水素・ヒドロペルオキシド・ケトン過酸化物・有機過酸化物・無機過酸化物を含む過酸化物、ペルオキソ酸、過硫酸塩が含まれる。
過酸化水素(H2O2)は、過酸化イオン(O2 2−)のプロトン付加形態である。これは酸化工程によって合成され、最大70%の濃度の水稀釈物として市販の物を購入することができる。さらに、過酸化水素は酸素の1電子減少形態(O2 −)から自然発生的に、あるいは酵素スーパーオキシドジスムターゼを使用して合成することができる。
過酸化水素に加えて、様々な化学現象を通じて他の化合物が水酸基を生じさせることができることは一般に周知されている。一例は次亜塩素酸(HOCl)であり、これはスーパーオキシド基(O2 −)あるいは鉄(II)イオン(Fe2+)等の電子供与体と反応することによって水酸基を作ることができる。
IUBMB(国際生化学・分子生物学連合)が推奨する命名法が、増補1(1993)、増補2(1994)増補3(1995)、増補4(1997)、増補5(各々Eur. J. Biochem. (1994) 223:1−5並びにEur. J. Biochem. (1995) 232:1−6; Eur. J. Biochem. (1996) 237:1−5; Eur. J. Biochem. (1997) 250:1−6; Eur. J. Biochem. (1999) 264:610−650)と供に、Enzyme Nomenclature 1992[Academic Press,San Diego,California,ISBN 0−12−227164−5(ハードカバー)、0−12−227165−3(ペーパーバック)]にて公開されている。IUBMBが推奨する分類法は、当分野において認知され追随されている。一般的には、当分野において酵素はIUBMB酵素分類法あるいはECナンバーで照会される。グループごとに掲載されている酵素は頻繁に更新され、IUBMBはこれを書籍並びにインターネットで公開している。
セリンタイプペプチダーゼ
族 代表的な酵素
S1 キモトリプシン、トリプシン
S2 アルファ−リチックエンドペプチダーゼ
S2 グルタミルエンドペプチダーゼ(V8)(Staphylococcus)
S2 プロテアーゼDo(htrA)(Escherichia)
S3 トガビリン
S5 リシルエンドペプチダーゼ
S6 IgA特異的セリンエンドペプチダーゼ
S7 フラビビリン
S29 C型肝炎ウイルスNS3エンドペプチダーゼ
S30 タバコエッチウイルス35kDaエンドペプチダーゼ
S31 ウシ下痢ウイルスp80エンドペプチダーゼ
S32 ウマ動脈炎ウイルス推定エンドペプチダーゼ
S35 リンゴ幹溝形成ウイルスセリンエンドペプチダーゼ
S43 ポリンD2
S45 ペニシリンアミドヒドロラーゼ
S8 サブチラーゼ
S8 サブチリシン
S8 ケクスシン
S8 トリペプチジルペプチダーゼII
S53 スードモナペプシン
S9 プロリルオリゴペプチダーゼ
S9 ジペプチジルペプチダーゼIV
S9 アシルアミノアシルペプチダーゼ
S10 カルボキシペプチダーゼC
S15 ラクトコッカスX−Proジペプチジルペプチダーゼ
S28 リソゾーマルプロXカルボキシペプチダーゼ
S33 プロリルアミノペプチダーゼ
S11 D−Ala−D−Alaペプチダーゼ族1(E.coli dacA)
S12 D−Ala−D−Alaペプチダーゼ族2(Strept.R61)
S13 D−Ala−D−Alaペプチダーゼ族3(E.coli dacB)
S24 LexAリプレッサー
S26 細菌性リーダーペプチダーゼI
S27 真核生物シグナルペプチダーゼ
S21 アセンブリン(ヘルペスウイルスペプチダーゼ)
S14 ClpPエンドペプチダーゼ(Clp)
S49 エンドペプチダーゼIV(sppA)(E.coli)
S41 Tail特異的プロテアーゼ(prc)(E.coli)
S51 ジペプチダーゼE(E.coli)
S16 エンドペプチダーゼLa(Lon)
S19 Coccidiodesエンドペプチダーゼ
S54 ロンボイド(Romboid)
スレオニンタイプペプチダーゼ
T1 多触媒性エンドペプチダーゼ(プロテオソーム)
システインタイプペプチダーゼ
族 代表的な酵素
C1 パパイン
C2 カルパイン
C10 ストレプトパイン
C3 ピコルナイン
C4 ポチウイルスNI−a(49 kDa)エンドペプチダーゼ
C5 アデノウイルスエンドペプチダーゼ
C18 C型肝炎ウイルスエンドペプチダーゼ2
C24 RHDV/FCプロテアーゼP3C
C6 ポチウイルスヘルパーコンポーネント(HC)プロテアーゼ
C7 クリ胴枯れ病ウイルスp29エンドペプチダーゼ
C8 クリ胴枯れ病ウイルスp48エンドペプチダーゼ
C9 トガウイルスnsP2エンドペプチダーゼ
C11 クロストリプシン
C12 ユビキチンC末端ヒドロラーゼ族1
C13 ヘモグロビナーゼ
C14 カスパーゼ(ICE)
C15 ピログルタミルペプチダーゼI
C16 マウス肝炎ウイルスエンドペプチダーゼ
C19 ユビキチンC末端ヒドロラーゼ族2
C21 カブ黄斑モザイクウイルスエンドペプチダーゼ
C25 ギンギパインR
C26 ガンマグルタミルヒドロラーゼ
C37 サウサンプトンウイルスペプチダーゼ
C40 ジペプチジルペプチダーゼVI(Bacillus)
C48 SUMOプロテアーゼ
C52 CAAXプレニルプロテアーゼ2
アスパラギン酸タイプペプチダーゼ
族 代表的な酵素
A1 ペプシン
A2 レトロペプシン
A3 カリフラワーモザイクウイルスペプチダーゼ
A9 スプマレトロウイルスエンドペプチダーゼ
A11 Drosophilaトランスポゾンコピアエンドペプチダーゼ
A6 ノダウイルスエンドペプチダーゼ
A8 細菌性リーダーペプチダーゼII
A24 タイプIVプレピリンリーダーペプチダーゼ
A26 オンプチン(Omptin)
A4 サイタリドペプシン(Scytalidopepsin)
A5 サーモプシン
金属ペプチダーゼ
族 代表的な酵素
M1 膜アラニンアミノペプチダーゼ
M2 ペプチジルジペプチダーゼA
M3 チメットオリゴペプチダーゼ
M4 サーモリシン
M5 マイコリシン
M6 免疫阻害因子A(Bacillus)
M7 Streptomyces小型中性プロテアーゼ
M8 リーシュマノリシン(Leishmanolysin)
M9 細菌性コラゲナーゼ
M10 マトリキシン
M10 セラリシン
M10 フラジリシン(Fragilysin)
M11 オートリシン(Chlamydomonas)
M12 アスタシン
M12 レプロリシン
M13 ネプリリシン
M26 IgA特異的金属エンドペプチダーゼ
M27 テントキシシリン(Tentoxilysin)
M30 Staphylococcus中性プロテアーゼ
M32 カルボキシペプチダーゼTaq
M34 炭素菌致死因子
M35 デューテロリシン
M36 Aspergillusエラスチン溶解金属エンドペプチダーゼ
M37 リソスタフィン
M41 細胞分裂タンパク質ftsH(E.coli)
M46 妊娠関連プラズマタンパク質A
M48 CAAXプレニルプロテアーゼ
M49 ジペプチジルペプチダーゼIII
その他モチーフHEXXHを持たないもの
M14 カルボキシペプチダーゼA
M14 カルボキシペプチダーゼH
M15 亜鉛D−Ala−D−Alaカルボキシペプチダーゼ
M45 Enterococcus D−Ala−D−Alaジペプチダーゼ
M16 ピトリリシン
M16 ミトコンドリアプロセッシングペプチダーゼ
M44 ワクシニアウイルス型金属エンドペプチダーゼ
M17 ロイシンアミノペプチダーゼ
M24 1型メチオニルアミノペプチダーゼ
M24 X−Proジペプチダーゼ
M24 2型メチオニルアミノペプチダーゼ
M18 酵母アミノペプチダーゼI
M20 グルタミン酸カルボキシペプチダーゼ
M20 Gly−Xカルボキシペプチダーゼ
M25 X−Hisジペプチダーゼ
M28 Vibroロイシンアミノペプチダーゼ
M28 アミノペプチダーゼY
M28 アミノペプチダーゼiap(E.coli)
M40 サルホロバスカルボキシペプチダーゼ
M42 グルタミルアミノペプチダーゼ(Lactococcus)
M38 E.coliベータアスパルチルペプチダーゼ
M22 O−シアログリコプロテインエンドペプチダーゼ
M52 加水分解酵素突然変異ペプチド
M50 SREBPサイト2プロテアーゼ
M50 胞子形成因子IVB(B.subtilis)
M19 膜ジペプチダーゼ
M23 ベータ溶解エンドペプチダーゼ
M29 好熱性細菌アミノペプチダーゼ
触媒機構が不明のペプチダーゼ
U3 胞子エンドペプチダーゼgpr(Bacillus)
U4 胞子形成シグマE因子プロセッシングペプチダーゼ(Bacillus)
U6 ムレインエンドペプチダーゼ(mepA)(E.coli)
U8 バクテリオファージムレインエンドペプチダーゼ
U9 プロヘッドエンドペプチダーゼ(T4ファージ)
U22 Drosophilaトランスポゾン297エンドペプチダーゼ
U24 トウモロコシトランスポゾンbs1エンドペプチダーゼ
U26 Enterococcus D−Ala−D−Alaカルボキシペプチダーゼ
U29 脳脊髄炎ウイルスエンドペプチダーゼ2A
U30 ツユクサ黄斑ウイルスプロテイナーゼ
U31 ヒトコロナウイルスプロテアーゼ
U32 ポルフィロモナスコラゲナーゼ
U33 イネtungro桿状ウイルスエンドペプチダーゼ
U34 ラクトコッカスジペプチダーゼA
「リパーゼ」には、ホスホグリセリド(phospoglyceride)、リポタンパク質、ジアシルグリセロール、その他を含む、脂質並びに脂肪酸、アシルグリセライドを加水分解する酵素が含まれる。植物では、脂質は水分減少及び病原菌感染を制限するための構造的成分として利用されている。こうした脂質には、脂肪酸から派生したワックスに加えクチン並びにスベリンが含まれる。ECリストに従って、多数のリパーゼの特性が記載されている。
「リグノセルロースを加水分解することのできる一つ以上の酵素」あるいは「一つ以上の酵素」とは、「処理反応」後にバイオマス中の糖類の遊離を増進するあるいは上昇させるあらゆる酵素もしくは酵素混合物と定義される。これには、反応の際にバイオマスに接触させると次の酵素の活性を上昇させる酵素を含むことができる。「酵素」を用いた処理を「酵素処理」と呼ぶ。関係する活性を持つ酵素には、セルラーゼ並びにキシラナーゼ、リグニナーゼ、アミラーゼ、プロテアーゼ、リパーゼ、グルクロニダーゼが含まれるがこれらに限定されない。これらの酵素の内多数のものはEC3.2.1族の典型的酵素であり、即ち、この族内の他の酵素は本発明に利用できる可能性がある。2つ以上の酵素を組み合わせて「酵素混合物」を作り、処理の過程においてリグノセルロースを加水分解することもできる。酵素混合物は以下から入手した酵素から構成することができる。(1)商業的供給者、(2)酵素を発現するクローニングした遺伝子、(3)原材料自体を含むブロスに加え、半固相あるいは固相培地由来のブロスを含めた、ブロス複合物(例えば培地中で微生物株が増殖してできたもので、その株は倍地中にタンパク質並びに酵素を分泌している。)。(4)(3)と同様に増殖した微生物株の細胞溶解物、(5)リグノセルロースを加水分解することのできる酵素を発現する植物材料。
本発明を実践する際に使用する酵素あるいは酵素群は、微生物もしくは酵母、真菌、細菌、植物によって体外産生させ、単離してリグノセルロース質原料に加えることができる。別の方法として、酵素を産生する生物体を原料に加えることもできる。本手法では、酵素を産生する植物をリグノセルロース質原料として使用して、リグノセルロース質原料に加えることができる。また、同時糖化発酵によって発酵生成物を産生する発酵生物内で酵素を作り出すこともできる。
「基質」あるいは「リグノセルロース」、「バイオマス」によって、セルロース及びヘミセルロース、リグニン、タンパク質、灰、澱粉並びに糖類等の炭水化物を含有する物質が意味される。構成成分の単糖類には、グルコース並びにキシロース、アラビノース、マンノース、ガラクトースが含まれる。「バイオマス」にはバージンバイオマス且つ(あるいは)農業バイオマス並びに産業有機物、建築解体残骸、自治体固形ゴミ、紙ゴミ、庭ゴミ等の廃棄物系バイオマスが含まれる。バイオマスの一般的な形態には木、並びに低木及び草、小麦、麦わら、サトウキビバガス、トウモロコシ、トウモロコシ皮、粒から伸びる繊維を含めたトウモロコシ粒、トウモロコシ等を製粉することによって生成される製品及びその副産物(湿式製粉並びに乾式製粉を含む。)、加えて自治体固形ゴミ、紙ゴミ、庭ゴミが含まれる。「混合バイオマス」はバージンバイオマスと使用済みバイオマスとのあらゆる混合物あるいは配合物であり、望ましくは重量にして5〜95%の使用済みバイオマスを有する。「農業バイオマス」には枝並びに潅木、籐類、トウモロコシ及びトウモロコシ皮、エネルギー作物、森林、果実、花、穀類、草、草本作物、葉、樹皮、針状葉、丸太、根、苗、短期輪作木質作物、低木、スイッチグラス、木、野菜、ブドウ木、硬質・軟質木材(有害物質を有する木材を含まない。)が含まれる。さらに、農業バイオマスには耕作並びに森林作業を含む農業作業によって生じる有機性廃棄物が含まれ、特に森林木性廃棄物が含まれる。農業バイオマスは任意の前記単独物あるいはあらゆる組み合わせのこれらの混合物であることができる。
実施例1 グルコース及びキシロース標準曲線
グルコース及びキシロース、アラビノース、ガラクトース、マンノースの標準品を、0%〜0.12%の範囲の濃度で調製した。変法ジニトロサリシリック酸法(DNS)によって540 nmで検出される吸光変化を得た。各糖標準物に対する線状曲線一致分析によって、各糖単量体に対するDNS定量法が正確な検出法であることが証明される(デーダは示していない。)。
スペザイムのみ:1.5 gのトウモロコシ茎葉に0.3 mL スペザイム CP(Genencor)をpH 5.2、40℃で48時間処理した。
上記に示した結果は、本発明の方法がリグノセルロース分解に有用な多数の利点を提供することを立証している。これらの利点には以下が含まれる:(1)簡単な手順で反応物を使用することができる、(2)当該工程で使用する酵素の量を減らすことができる、(3)高い濃度の糖溶液を生成して利用することができる、(4)毒性生成物が生じないため、処理した生成物はさらに加工する必要がなく、発酵に直接使用することができる。また、これらの利点から経済的利益が導かれる。
Claims (31)
- リグノセルロースを加水分解するための方法であって、中程度条件下で該リグノセルロースと少なくとも1つの化学物質とを接触させて、処理したリグノセルロースを産生する工程、および該処理したリグノセルロースと、リグノセルロースを加水分解し得る少なくとも1つの酵素とを接触させる工程を包含し、ここで、該化学物質が、酸化剤、変性剤、界面活性剤、有機溶媒、塩基、およびこれらの組合わせからなる群より選択される、方法。
- 請求項1に記載の方法であって、ここで、前記中程度条件が、以下:
a)約10℃〜約90℃の温度;
b)約2atm未満の圧力;および
c)約pH 4.0と約pH 10.0との間のpH、
からなる群より選択される少なくとも2つの条件を含む、方法。 - 請求項1に記載の方法であって、ここで、前記中程度条件が、以下:
a)約10℃〜約90℃の温度;
b)約2atm未満の圧力;および
c)約pH 4.0と約pH 10.0との間のpH、
を含む、方法。 - 請求項1に記載の方法であって、ここで、前記化学物質が、過酸化水素、尿素過酸化水素、過酸化ベンゾイル、スーパーオキシド、スーパーオキシドカリウム、次亜塩素酸塩、次亜塩素酸、塩素、硝酸、過酸化物、ペルオキシ酢酸、過硫酸塩、過炭酸塩、過マンガン酸塩、四酸化オスミウム、酸化クロム、およびドデシルベンゼンスルホン酸ナトリウムからなる群より選択される酸化剤を含む、方法。
- 請求項1に記載の方法であって、ここで、前記化学物質が、有機溶媒を含む、方法。
- 請求項1に記載の方法であって、ここで、前記化学物質が、変性剤を含む、方法。
- 請求項1に記載の方法であって、ここで、前記化学物質が、界面活性剤を含む、方法。
- 請求項1に記載の方法であって、ここで、前記化学物質が、塩基を含む、方法。
- 請求項1に記載の方法であって、前記リグノセルロースを、粉砕、ミリング、煮沸、凍結、および減圧濾過からなる群より選択される少なくとも1つの物理的処理に供する工程をさらに包含する、方法。
- 請求項1に記載の方法であって、ここで、前記中程度条件が、約80℃の温度を含む、方法。
- 請求項1に記載の方法であって、ここで、前記中程度条件が、約pH 5.0のpHを含む、方法。
- 請求項1に記載の方法であって、ここで、前記接触が、約24時間にわたって生じる、方法。
- 請求項1に記載の方法であって、ここで、前記酵素が、セルラーゼ、キシラナーゼ、リグニナーゼ、アミラーゼ、グルクロニダーゼ、プロテアーゼ、リパーゼ、およびグルクロニダーゼからなる群より選択される少なくとも1つの酵素を含む、方法。
- 請求項1に記載の方法であって、ここで、酵素の添加前に、前記温度が、該酵素にとって最適であるように調整される、方法。
- 請求項1に記載の方法であって、ここで、酵素の添加前に、前記pHが、該酵素にとって最適であるように調整される、方法。
- 請求項1に記載の方法であって、ここで、前記酵素の添加前に、前記化学物質が、除去される、方法。
- 請求項1に記載の方法であって、リサイクル化学物質を得るためのさらなる処理前に、前記処理したリグノセルロースから前記化学物質を除去する工程をさらに包含する、方法。
- 請求項1に記載の方法であって、ここで、前記リグノセルロースと、少なくとも1つの化学物質とを接触させる工程が、該リグノセルロースと、リグノセルロースを加水分解し得る少なくとも1つの酵素とを接触させる工程と同時に生じる、方法。
- 請求項1に記載の方法であって、少なくとも1つの発酵生物の添加工程をさらに包含し、ここで、該方法が、少なくとも1つの発酵ベースの生成物の生産をもたらす、方法。
- 請求項19に記載の方法であって、ここで、前記生成物が、乳酸、燃料、有機酸、産業的酵素、医薬品、およびアミノ酸からなる群より選択される、方法。
- リグノセルロース材料を前処理するための方法であって、中程度条件下で該材料と少なくとも1つの化学物質とを接触させて、処理したリグノセルロースを産生する工程を包含し、ここで、該化学物質が、酸化剤、変性剤、界面活性剤、有機溶媒、塩基、およびこれらの組合わせからなる群より選択される、方法。
- 植物材料から物質を遊離するための方法であって、以下:
a)約10℃〜約90℃の温度;
b)約2atm未満の圧力;および
c)約pH 4.0と約pH 10.0との間のpH、
からなる群より選択される少なくとも1つの条件下で該植物材料と少なくとも1つの化学物質とを接触させて、処理した植物材料を産生する工程を包含し、ここで、該化学物質が、酸化剤、変性剤、界面活性剤、有機溶媒、塩基、およびこれらの組合わせからなる群より選択される、方法。 - 請求項22に記載の方法であって、前記処理した植物材料と、リグノセルロースを加水分解し得る少なくとも1つの酵素とを接触させる工程をさらに包含する、方法。
- 請求項23に記載の方法であって、ここで、前記植物材料が、リグノセルロースを加水分解し得る少なくとも1つの酵素を含む、方法。
- 請求項24に記載の方法であって、ここで、前記植物材料が、リグノセルロースを加水分解し得る少なくとも1つの酵素を発現するように遺伝学的に操作されている少なくとも1つの植物を含む、方法。
- 請求項25に記載の方法であって、前記植物材料と前記化学物質とを接触させる前に、リグノセルロースを加水分解し得る前記酵素を発現可能な条件下で該植物材料をインキュベートする工程を包含する、方法。
- 請求項22に記載の方法であって、ここで、前記物質が、酵素、医薬品、および機能性食品からなる群より選択される、方法。
- 請求項27に記載の方法であって、ここで、前記植物材料が、前記物質を発現するように遺伝学的に操作されている少なくとも1つの植物を含む、方法。
- リグノセルロースを加水分解するための方法であって、該リグノセルロースと少なくとも1つの化学物質とを接触させて、処理したリグノセルロースを産生する工程、および該処理したリグノセルロースと、リグノセルロースを加水分解し得る少なくとも1つの酵素とを接触させる工程を包含し、ここで、該化学物質が、次亜塩素酸塩、次亜塩素酸、塩素、硝酸、過酸化物、ペルオキシ酢酸、過硫酸塩、過炭酸塩、過マンガン酸塩、四酸化オスミウム、酸化クロム、ドデシルベンゼンスルホン酸ナトリウム、および酸素ラジカルを産生し得る化合物からなる群より選択される酸化剤である、方法。
- リグノセルロースを加水分解するための方法であって、約9.0〜約14.0のpHで該リグノセルロースと塩基とを接触させて、処理したリグノセルロースを産生する工程、および該処理したリグノセルロースと、リグノセルロースを加水分解し得る少なくとも1つの酵素とを接触させる工程を包含する、方法。
- 請求項30に記載の方法であって、ここで、前記塩基が、炭酸ナトリウムまたは水酸化カリウムである、方法。
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WO2004081185A2 (en) | 2004-09-23 |
NZ542391A (en) | 2008-04-30 |
BRPI0408165A (pt) | 2006-03-21 |
WO2004081185A3 (en) | 2004-10-21 |
AU2004219612B2 (en) | 2010-07-29 |
US20040231060A1 (en) | 2004-11-25 |
US20090004692A1 (en) | 2009-01-01 |
CA2518144A1 (en) | 2004-09-23 |
EP1601777A2 (en) | 2005-12-07 |
US20090004706A1 (en) | 2009-01-01 |
AU2004219612A1 (en) | 2004-09-23 |
WO2004081185B1 (en) | 2004-12-23 |
US20090004698A1 (en) | 2009-01-01 |
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