this semipermeable microencapsulating membrane was impermeable to serum albumins ( m.w . 66,000 or 45,000 ) and human hemoglobin ( m.w . 64,000 ) , but permitted passage of low molecular weight substances ( alpha-lactalbumin , or trypsinogen ; m.w . 14,200 or 24,000 ) .
C0086418
human
C0002287
alpha-lactalbumin