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    首页 分子通 按分子结构分类 有机化合物 有机聚合物 多肽

    多肽

    肽是由两个或两个以上氨基酸通过脱水缩合形成的化合物。最简单的肽由两个氨基酸构成，称为二肽；包含多个氨基酸的肽则被称为多肽。通常情况下，含有50个及以上氨基酸单位的多肽，则归类为蛋白质。肽广泛存在于动物、植物和微生物中，在生物体内的生长发育、细胞分化、大脑活动、肿瘤病变、免疫防御、生殖控制以及抗衰老等方面都扮演着重要角色。

    例如，谷胱甘肽是某些酶的重要辅基，参与体内氧化还原反应；多种激素如催产素、加压素、胰高血糖素及促肾上腺皮质激素等，均属于多肽类，通过调节机体代谢发挥作用。下丘脑分泌的激素调节因子也是由多肽构成，控制着其他内分泌腺释放激素的过程。

    近年来，在高等动物的大脑中发现了具有镇痛作用的脑啡肽（五肽）。许多抗生素如多粘菌素、短杆菌肽等也是肽类物质，具备强大的抗菌能力。此外，多肽是指通过肽键连接形成的一系列氨基酸单位构成的长链结构。一般而言，含有数十个或更少氨基酸单位的多肽称为肽；而更多氨基酸单位组成的则被称为蛋白质。

    在命名时，通常按照从氨基末端（N端）到羧基末端（C端）的顺序书写。如Ser·Gly·Try·Ala·Leu这个五肽由5个氨基酸残基和4个肽键组成，命名为丝氨酰甘氨酰酪氨酰丙氨酰亮氨酸。

    肽广泛存在于动植物组织中，并且其中许多具有特殊生物活性的功能性肽统称为生物活性肽。近年来的研究表明，几乎所有重大生命科学理论——包括免疫防御、生殖控制、肿瘤病变和抗衰防老等——均涉及相关的活性肽，这些理论与临床医学实践密切相关，因此生物活性肽在实际应用中也具有重要价值。

    生物活性肽种类繁多，例如促肾上腺皮质激素为39肽，催产素为九肽，而两种重要的脑啡肽均为五肽。许多抗菌素也是由肽类物质构成的。生长因子则受控于基因，在细胞发育过程中起到调节和控制作用。表皮生长因子含有50个氨基酸残基，神经生长因子则由118个氨基酸组成。

    相关化合物

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— H-Pyr-His-Trp-Ser-Tyr-D-Lys(dodecyl)(dodecyl)-Leu-Arg-Pro-Gly-NH2 —— C71H108N18O13
    H-Pyr-His-Trp-Ser-Tyr-D-Lys(dodecyl)(dodecyl)-Leu-Arg-Pro-Gly-NH2
    —— H-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-NH2 —— C80H141N25O20S
    H-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-NH2
    —— H-Pyr-Val-Leu-Ser-Tyr-D-Ala-Leu-Arg-Pro-Gly-NH2 —— C50H80N14O13
    H-Pyr-Val-Leu-Ser-Tyr-D-Ala-Leu-Arg-Pro-Gly-NH2
    —— H-Tyr-D-Ala-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr-Leu-Phe-Lys-Asn-Ala-Ile-Ile-Lys-Asn-Ala-Tyr-Lys-Lys-Gly-Glu-OH —— C159H253N39O46S
    H-Tyr-D-Ala-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr-Leu-Phe-Lys-Asn-Ala-Ile-Ile-Lys-Asn-Ala-Tyr-Lys-Lys-Gly-Glu-OH
    —— H-Asp-Gly-Gly-Pro-Tyr-Lys-Met-Gln-His-Gly-Arg-Trp-Gly-Ser-Pro-Pro-Lys-Asp-OH —— C88H129N27O26S
    H-Asp-Gly-Gly-Pro-Tyr-Lys-Met-Gln-His-Gly-Arg-Trp-Gly-Ser-Pro-Pro-Lys-Asp-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH —— C57H87N13O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH —— C56H87N13O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nva-Tyr-Cys(2)-OH —— C64H86N16O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nva-Pro-Cys(2)-OH —— C52H85N13O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nle-Tyr-Cys(2)-OH —— C57H89N13O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Abu-Nle-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Trp-Nva-Tyr-Cys(2)-OH —— C63H90N14O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-aIle-Trp-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nva-Pro-Cys(2)-OH —— C60H84N16O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH —— C57H83N15O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Abu-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Trp-Nva-Tyr-Cys(2)-OH —— C66H84N16O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Trp-Nva-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nle-Pro-Cys(2)-OH —— C61H86N16O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Trp-Nle-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Abu-Nle-Pro-Cys(2)-OH —— C54H83N15O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-aIle-Abu-Nle-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-Phe-Abu-Nle-Pro-Cys(2)-OH —— C56H85N13O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Abu-Cys(1)-Phe-Abu-Nle-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-Phe-Trp-Nle-Tyr-Cys(2)-OH —— C68H86N16O16S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-Phe-Trp-Nle-Tyr-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Trp-Nva-Pro-Cys(2)-OH —— C62H82N16O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Trp-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Abu-Nva-Pro-Cys(2)-OH —— C55H79N15O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-Phe-Abu-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-aIle-Trp-Nva-Pro-Cys(2)-OH —— C59H84N16O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-aIle-Trp-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-Phe-Abu-Nva-Pro-Cys(2)-OH —— C56H79N15O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Pro-Cys(1)-Phe-Abu-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-aIle-Abu-Nva-Pro-Cys(2)-OH —— C52H81N15O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-His-Pro-Abu-Cys(1)-aIle-Abu-Nva-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Trp-Nle-Pro-Cys(2)-OH —— C61H90N14O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Trp-Nle-Pro-Cys(2)-OH
    —— H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Abu-Nle-Pro-Cys(2)-OH —— C54H87N13O15S4
    H-Gly-Cys(1)-Cys(2)-Ser-Nle-Pro-Pro-Cys(1)-aIle-Abu-Nle-Pro-Cys(2)-OH
    —— 5-[[(2S,3S)-1-[[(2S)-1-[[(2S)-1-[[(9R,12S,15S,18S,21S,24S,27S,30S)-9-[[(2S)-4-carboxy-1-[[(2S)-1-[[2-[[(1S)-1-carboxy-2-hydroxyethyl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-1-oxobutan-2-yl]carbamoyl]-27-(2-carboxyethyl)-18-(carboxymethyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaen-30-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-methyl-1-oxopentan-2-yl]carbamothioylamino]-2-(3-hydroxy-6-oxoxanthen-9-yl)benzoic acid —— C111H130N16O32S3
    5-[[(2S,3S)-1-[[(2S)-1-[[(2S)-1-[[(9R,12S,15S,18S,21S,24S,27S,30S)-9-[[(2S)-4-carboxy-1-[[(2S)-1-[[2-[[(1S)-1-carboxy-2-hydroxyethyl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-1-oxobutan-2-yl]carbamoyl]-27-(2-carboxyethyl)-18-(carboxymethyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaen-30-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-methyl-1-oxopentan-2-yl]carbamothioylamino]-2-(3-hydroxy-6-oxoxanthen-9-yl)benzoic acid
    —— (4S)-4-[[(9R,12S,15S,18S,21S,24S,27S,30S)-30-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-acetamido-3-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-18-(2-amino-2-oxoethyl)-27-(3-amino-3-oxopropyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaene-9-carbonyl]amino]-5-[[(2S)-1-[[2-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-5-oxopentanoic acid —— C92H124N18O25S2
    (4S)-4-[[(9R,12S,15S,18S,21S,24S,27S,30S)-30-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-acetamido-3-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-18-(2-amino-2-oxoethyl)-27-(3-amino-3-oxopropyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaene-9-carbonyl]amino]-5-[[(2S)-1-[[2-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-5-oxopentanoic acid
    —— (4S)-4-[[(9R,12S,15S,18S,21S,24S,27S,30S)-30-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-acetamido-3-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-27-(3-amino-3-oxopropyl)-18-(carboxymethyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaene-9-carbonyl]amino]-5-[[(2S)-1-[[2-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-5-oxopentanoic acid —— C92H123N17O26S2
    (4S)-4-[[(9R,12S,15S,18S,21S,24S,27S,30S)-30-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-acetamido-3-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-27-(3-amino-3-oxopropyl)-18-(carboxymethyl)-12,15-bis[(4-hydroxyphenyl)methyl]-21,24-bis(2-methylpropyl)-11,14,17,20,23,26,29-heptaoxo-7,32-dithia-10,13,16,19,22,25,28-heptazatricyclo[32.2.2.22,5]tetraconta-1(37),2(40),3,5(39),34(38),35-hexaene-9-carbonyl]amino]-5-[[(2S)-1-[[2-[[(2S)-1-amino-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-5-oxopentanoic acid
    —— 2-[(6S,9S,15S,18R,23R,26S,29S)-6-(4-aminobutyl)-23-carbamoyl-26-(carboxymethyl)-15-[3-(diaminomethylideneamino)propyl]-18-[[2-[[(2S)-4-methyl-2-[[(2S)-3-phenyl-2-[[2-(2-propylpentanoylamino)acetyl]amino]propanoyl]amino]pentanoyl]amino]acetyl]amino]-2,5,8,11,14,17,25,28-octaoxo-20,21-dithia-1,4,7,10,13,16,24,27-octazabicyclo[27.3.0]dotriacontan-9-yl]acetic acid —— C62H98N18O18S2
    2-[(6S,9S,15S,18R,23R,26S,29S)-6-(4-aminobutyl)-23-carbamoyl-26-(carboxymethyl)-15-[3-(diaminomethylideneamino)propyl]-18-[[2-[[(2S)-4-methyl-2-[[(2S)-3-phenyl-2-[[2-(2-propylpentanoylamino)acetyl]amino]propanoyl]amino]pentanoyl]amino]acetyl]amino]-2,5,8,11,14,17,25,28-octaoxo-20,21-dithia-1,4,7,10,13,16,24,27-octazabicyclo[27.3.0]dotriacontan-9-yl]acetic acid
    —— H-Gly-Ser-Asn-Phe-Thr-Ser-Ala-Thr-Val-Lys-Ala-OH —— C46H75N13O17
    H-Gly-Ser-Asn-Phe-Thr-Ser-Ala-Thr-Val-Lys-Ala-OH
    —— H-Lys-Trp-Lys-Lys-Phe-Ile-Lys-Ser-Leu-Thr-Lys-Ala-Ala-Lys-Thr-Val-Val-Lys-Thr-Ala-Lys-Lys-Pro-Leu-Ile-Val-OH —— C142H248N36O31
    H-Lys-Trp-Lys-Lys-Phe-Ile-Lys-Ser-Leu-Thr-Lys-Ala-Ala-Lys-Thr-Val-Val-Lys-Thr-Ala-Lys-Lys-Pro-Leu-Ile-Val-OH
    —— H-Ala-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH —— C81H130N24O18S
    H-Ala-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-Ala-Asn-Phe-Lys-Arg-Lys-OH —— C79H130N22O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-Ala-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-D-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH —— C82H132N24O19S
    H-Thr-Ala-Val-Gln-Met-D-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-N(Me)Arg-Lys-OH —— C83H134N24O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-N(Me)Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-D-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH —— C82H132N24O19S
    H-Thr-Ala-Val-Gln-D-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-D-Asn-Phe-Lys-Arg-Lys-OH —— C82H132N24O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-D-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-OH —— C51H81N13O13S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-N(Me)Phe-Lys-Arg-Lys-OH —— C83H134N24O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-N(Me)Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-N(Me)Lys-OH —— C83H134N24O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-N(Me)Lys-OH
    —— H-Thr-Ala-Ala-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH —— C80H128N24O19S
    H-Thr-Ala-Ala-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Ala-OH —— C79H125N23O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Ala-OH
    —— H-Gly-Ser-D-Asn-Phe-Thr-Ser-Thr-Thr-Val-Lys-Ala-OH —— C47H77N13O18
    H-Gly-Ser-D-Asn-Phe-Thr-Ser-Thr-Thr-Val-Lys-Ala-OH
    —— H-Gly-Ser-Asn-Phe-Thr-Ser-D-aThr-Thr-Val-Lys-Ala-OH —— C47H77N13O18
    H-Gly-Ser-Asn-Phe-Thr-Ser-D-aThr-Thr-Val-Lys-Ala-OH
    —— H-Ile-Leu-Ala-Trp-Lys-Trp-Ala-Trp-Trp-Ala-Trp-Arg-Arg-OH —— C94H125N25O14
    H-Ile-Leu-Ala-Trp-Lys-Trp-Ala-Trp-Trp-Ala-Trp-Arg-Arg-OH
    —— H-D-aThr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH —— C82H132N24O19S
    H-D-aThr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Arg-Lys-OH
    —— H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Ala-Lys-OH —— C79H125N21O19S
    H-Thr-Ala-Val-Gln-Met-Ala-Val-Phe-Ile-His-Asn-Phe-Lys-Ala-Lys-OH
    —— H-Ile-Leu-Lys-Lys-Trp-Pro-Trp-Trp-Pro-Trp-Arg-Arg-Lys-OH —— C96H138N26O14
    H-Ile-Leu-Lys-Lys-Trp-Pro-Trp-Trp-Pro-Trp-Arg-Arg-Lys-OH
    —— (2S)-5-amino-2-[[(2S)-1-[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-6-amino-2-[[(2S)-6-amino-2-[[(2S)-2-[(2-aminoacetyl)amino]-5-(diaminomethylideneamino)pentanoyl]amino]hexanoyl]amino]hexanoyl]amino]-5-[[amino(pyrrolidin-1-ium-1-ylidene)methyl]amino]pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-oxopentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carbonyl]amino]-5-oxopentanoic acid —— C74H138N35O16+
    (2S)-5-amino-2-[[(2S)-1-[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-6-amino-2-[[(2S)-6-amino-2-[[(2S)-2-[(2-aminoacetyl)amino]-5-(diaminomethylideneamino)pentanoyl]amino]hexanoyl]amino]hexanoyl]amino]-5-[[amino(pyrrolidin-1-ium-1-ylidene)methyl]amino]pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-oxopentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carbonyl]amino]-5-oxopentanoic acid
    —— H-Gly-Ser-Asn-Phe-Ala-Ser-Thr-Thr-Val-Lys-Ala-OH —— C46H75N13O17
    H-Gly-Ser-Asn-Phe-Ala-Ser-Thr-Thr-Val-Lys-Ala-OH