TABLE 2.

Quantification of retinoic acid (RA), retinol (ROL), and retinyl esters (RE) in 4-week-old rabbit liver, rib cartilage perichondrium, AC, UGP, and LGP

Values are means ± S.E. of the indicated numbers of samples derived from different rabbits.

Tissue	RA	ROL	RE	No. of samples
	pmol/g tissue	nmol/g tissue	nmol/g tissue
Liver	101.5 ± 5.0	5.5 ± 0.6	97.7 ± 5.7	10
Perichondrium	*4.9 ± 0.3	1.6 ± 0.4	0.61 ± 0.13	7
AC	*2.2 ± 0.3	1.3 ± 0.2	0.08 ± 0.02	4
UGP	0.6 ± 0.1	1.1 ± 0.2	0.03 ± 0.01	4
LGP	*1.8 ± 0.2	1.7 ± 0.2	0.20 ± 0.11	4

* p < 0.003 perichondrium vs. LGP, AC vs. UGP, or UGP vs. LGP.