Table 5. Peptides identified of goat milk fermented by Lc. lactis ssp. lactis BD17 with retention time (RT) detected on nano liquid chromatography mass spectrometry (LC-MS/MS). Peptides in bold letters indicate a match with RT

Retention time (min)	Retention time (min)	m/z [Da]	MH⁺ [Da]	Peptide identified	Parent protein
11.29	11.29	665.33	1,329.66	ARHPHPHLSFM	k-Casein (A0A140T8A9^*)
11.29	11.22	495.75	990.49	ITVDDKHY	α_s2-Casein (P02663^*)
11.89	11.81	563.74	1,126.48	AFHTSGYDTQ	ά-Lactalbumin (B6V3I5^*)
	11.87	581.34	1,161.67	EKNRLNFLK	α_s2-Casein (P02663^*)
	11.89	673.33	1,345.66	ARHPHPHLSFM	k-Casein (A0A140T8A9^*)
12.30	12.30	559.75	1,118.49	QQQTEDELQ	β-Casein (P02666^*)
12.30	12.30	546.79	1,092.57	YQKALNEIN	α_s2-Casein (P02663^*)
15.86	15.86	470.74	940.47	IPNPIGSEN	α_s1-Casein (P02662^*)
15.86	15.86	521.27	1,041.54	RYLGYLEQ	α_s1-Casein (P02662^*)
16.20	16.20	413.72	826.43	IPNPIGSE	α_s1-Casein (P02662^*)
	16.20	560.78	1,120.55	FYQKFPQY	α_s2-Casein (P02663^*)
	16.24	621.31	1,241.61	DELQDKIHPF	β-Casein (P02666^*)
	16.26	457.24	913.48	RYLGYLE	α_s1-Casein (P02662^*)
	16.26	610.29	1,219.57	SRYPSYGLNY	k-Casein (A0A140T8A9^*)
20.54	20.54	676.34	1,351.68	MPFPKYPVEPF	β-Casein (P02666^*)
20.54	20.59	329.20	657.40	VVVPPF	β-Casein (P02666^*)
23.59	23.50	683.86	1,366.72	RDMPIQAFLLY	β-Casein (P02666^*)
	23.51	559.80	1,118.59	MFPPQSVLSL	β-Casein (P02666^*)
	23.53	385.74	770.48	VVVPPFL	β-Casein (P02666^*)
	23.54	948.04	1,895.07	LYQEPVLGPVRGPFPII	β-Casein (P02666^*)
	23.56	795.47	1,589.94	EPVLGPVRGPFPIIV	β-Casein (P02666^*)
	23.59	602.33	1,203.66	RDMPIQAFLL	β-Casein (P02666^*)
24.51	24.50	859.50	1,718.00	QEPVLGPVRGPFPIIV	β-Casein (P02666^*)
24.51	24.55	484.79	968.58	TPVVVPPFL	β-Casein (P02666^*)
26.00	26.07	548.30	1,095.59	MPIQAFLLY	β-Casein (P02666^*)
26.00	26.08	809.97	1,618.93	QEPVLGPVRGPFPII	β-Casein (P02666^*)
29.61	29.61	753.42	1,505.84	QEPVLGPVRGPFPI	β-Casein (P02666^*)
30.97	30.98	776.42	1,551.83	TQTPVVVPPFLQPE	β-Casein (P02666^*)

Protein access code at https://www.uniprot.org/.
A, alanine; D, aspartic acid; E, glutamic acid; F, phenylalanine; G, glysin; I, isoleucine; K, lysine; L, leucine; M, methionine; N, asparagine; P, proline; Q, glutamine; r, arginine; s, serine; t, threonin; v, valine; W, triptophan; Y, tyrosine.