| B461 | L-Tryptophan（L-色氨酸） | 5g | 230 | Sigma T0254 |
| B462 | L-Tryptophan（L-色氨酸） | 25g/100g/250g/500g | 140/360/880/1450 | 国产 |
| B463 | L-Tyrosine(L-酪氨酸) | 25g/100g/250g/500g/1kg | 60/130/300/480/750 | 国产 |
| B464 | L-Valine(L-缬氨酸) | 25g /100g/250g/500g | 100/260/570/890 | 国产 |
| B465 | Lysozyme(EggWhite)(溶菌酶) | 1g/5g/10g/100g原装 | 130/590/1080/9000 | Amresco 0663 |
| B466 | L-α-Lysolecithin(溶血卵磷脂) | 25mg原装 | 620 | Sigma L4129 |
| B467 | L-α-Phosphatidylethanolamine,Distearoyl(磷脂酰乙醇胺) | 25mg/100mg/500mg原装 | 370/1240/4250 | Sigma P3531 |
| B453 | MacConkeyAgar(麦康凯琼脂) | 500g原装 | 830 | BD 212123 |
| B454 | MacConkeyAgar(麦康凯琼脂) | 250g/1kg/5kg | 140/500/2300 | 国产 |
| B455 | MacerozymeR-10(离析酶R-10) | 1g/5g/10g/100g原装 | 160/650/1050/6600 | Yakult.JAPAN |
| B456 | Magenta-CaprylateMagenta(锌酸钠) | 10mg原装/100mg原装 | 250/1680 | INALCO1758-0850 |
| B457 | Magenta-Gal(5-溴-6氯-3-吲哚-β-D-半乳糖苷) | 100mg原装/1g原装 | 250/1680 | INALCO1758-0400 |
| B458 | Magenta-Gluc(β-葡糖苷醛酸酶的底物) | 10mg原装/100mg原装 | 250/1680 | INALCO1758-0450 |
| B459 | Magenta-Glucoside | 100mg原装/1g原装 | 250/1680 | INALCO1758-0525 |
| B461 | MagnesiumChloride(氯化镁) | 100g/500g/5kg原装 | 130/260/2150 | Sigma M0250 |
| B463 | Magnesiumsulfate(硫酸镁) | 100g/1kg/5kg原装 | 160/620/2800 | Sigma M1880 |
| B464 | Maleicacid(顺丁烯二酸(马来酸)) | 100g/250g/500g/1kg | 100/200/380/630 | Sigma M0375 |
| B465 | Maleicaciddisodium(顺丁烯二酸钠(马来酸钠)) | 10g/25g/100g原装 | 320/650/2180 | Sigma M9009 |
| B466 | MaltExtract(麦芽提取物) | 100g/500g | 460/750 | BD/Sigma分装 |
| B469 | MaltExtractAgar(麦芽提取琼脂) | 500g原装 | 1150/1260 | BD 211220/Oxoid |
| B470 | MaltExtractBroth(麦芽提取肉汤) | 500g原装 | 1050/1230 | BD 211320/Oxoid |
| B471 | Maltose(麦芽糖) | 100g/1kg原装 | 190/1560 | Sigma M2250 |
| B472 | Mannase(甘露聚糖酶) | 50mg/100mg/500mg原装 | 询价 | Yakult.JAPAN |
| B473 | Mannitolsaltagar(甘露糖琼脂) | 500g原装/5LB原装 | 350/1790 | BD 211407 |
| B474 | Melamine(三聚氰胺) | 5g/25g/100g/1kg原装 | 150/280/480/1050 | Sigma M2695 |
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