Biomineralisation by earthworms – an investigation into the stability and distribution of amorphous calcium carbonate

Table 4 Granule amino acid composition measured in 2012 by RP-HPLC

Sample name	Coombe	Frilsham	Hamble	Kettering	Neville	Parkgate	Soil science	St Albans field	Tidmarsh	Wilderness	LOD
Amino acid content/pico mol mg ⁻¹
Asx	144	152	207	217	102	179	210	32	177	125	10
Glx	90	107	178	138	54	151	151	24	123	54	16
Ser	79	114	177	176	103	130	152	40	117	101	25
L Thr	52	81	82	123	79	63	108	26	74	50	4
L His	8	12.	57	19	9	23	18	0	19	8	0
Gly	109	192	386	376	173	265	258	82	182	157	60
L Arg	32	45	57	55	41	47	54	14	45	25	5
Ala	65	106	161	194	95	115	152	35	107	87	10
Val	59	93	87	141	72	60	108	29	77	37	8
Phe	16	25	38	33	17	33	29	0	23	10	8
Leu	35	57	58	76	41	43	70	21	48	29	16
Ile	23	44	35	59	28	26	50	5	35	15	7
Met	5	45	57	55	41	47	54	14	45	25	5

Determined on the same powders derived from several granules per soil on which ACC content was determined, Table 3).
Granules were also analysed for Tyr but this amino acid was below the detection limit for all samples (8.00 pico mol mg⁻¹).

ISSN: 1467-4866