Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://journals.physiology.org/doi/10.1152/ajprenal.1995.268.2.F273?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-CD40-4