Table 3. Abundance of Ig heavy and light chains in the early and late lactation proteomes.

Ig chain	EL Mammary transcriptome %	EL Milk proteome %	LL Milk Proteome %
IgA	5.93 × 10−4	0.08	2.16
IgG	1.43 × 10−3	0.68	0.46
IgE	Not detected	Not detected	Not detected
IgM	5.50 × 10−4	0.25	Not detected
IgK	3.98 × 10−3	0.10	0.58
IgL	2.75 × 10−4	0.11	0.51

Percentage of the total transcripts/peptides detected in the mammary transcriptome and milk proteomes. EL = early lactation, LL = late lactation.